Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1902)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1906)

Proceedings of the Royal Irish Academy - Royal Irish Academy. (Royal Irish Academy, 1911)

Proceedings of the Southern Pasture and Forage Crop Improvement Conference - United States. Agricultural Research Service. (Agricultural Research Service (Southern Region), U.S. Dept. of Agriculture, 1974)

Proceedings of the third Prairie Conservation and Endangered Species Workshop : February 1992 at Brandon University, Brandon, Manitoba - Provincial Museum of Alberta. (Curatorial Section, Provincial Museum of Alberta, 1992)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1960)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1967)

Prodrome de la flore des environs d'Anvers et d'une partie de la Campine - Société Encyclographique Des Sciences Médicales (1841)

The production of field crops, a textbook of agronomy - Hutcheson, Thomas Barksdale, 1882 - (McGraw-Hill, 1948)

Progress report on pesticides and related activities - United States. Department of Agriculture. (1967)

The protection of hays, 1979-85 : citations from Agricola concerning diseases and other environmental consideration - National Agricultural Library (U.S.) (United States Dept. of Agriculture, National Agricultural Library, 1986)

The protection of lawn and turf grasses, 1979-April 1991 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1991)

The protection of pome fruits, 1979–March 1985 : citations from Agricola concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1985)

The protection of soybeans, January 1980-November 1984 : citations from Agricola concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1985)

The protection of turf grasses, 1979-March 1987 : citations from AGRICOLA concerning diseases and other environmental considerations - National Agricultural Library (U.S.) (U.S. Dept. of Agriculture, National Agricultural Library, 1987)

A provisional list of the parasitic fungi of Wisconsin - Davis, John Jefferson. (1914)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1934)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1923)

Publications in botany - National Museum of Natural Sciences (Canada) (The Museum, 1981)

[Publications on plant pathology from Cornell Agricultural Experiment Station Memoirs, collected by H.S. Jackson.] - Jackson, H. S. (Herbert Spencer), 1883 -1951 (Cornell University], 1915)

Quack grass eradication, prepared especially for farmers desirous of destroying this dangerous pest - Crane, Peter Bela, 1847 - (Webb Publishing Co, 1910)

Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1971)

Quarterly report - Montana Fish; Game Commission. Wildlife Restoration Division. (The Division, 1954)

Quarterly summary of re-identifications, January, February, March 1964 : Summary No. 16 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Quarterly summary of re-identifications, January, February, March 1965 : Summary No. 20 - Hyland, Howard L. (New Crops Research Branch, Plant Industry Station, 1960)

Quarterly summary of re-identifications, July, August, September 1962 : Summary No. 10 - United States. Bureau of Plant Industry, (New Crops Research Branch, Plant Industry Station, 1960)

Range plant communities and range health assessment guidelines for the foothills fescue natural subregion of Alberta : second approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands & Forests Division, Rangeland Management Branch, 2005)

Range plant communities and range health assessment guidelines for the mixedgrass natural subregion of Alberta : first approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands & Forests Division, Rangeland Management Branch, 2005)

Range plant community types and carrying capacity for the dry and central mixedwood subregion : second approximation - Willoughby, Michael, 1959 - (Alberta Environmental Protection, Lands and Forest Services, 1996)

Range plant community types and carrying capacity for the lower foothills subregion of Alberta : third approximation - Alberta. Public Lands Division. (Alberta Environment, Land and Forest Service, 2000)

Range plant community types and carrying capacity for the montane subregion : fifth approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands Division, 2003)

Range plant community types and carrying capacity for the montane subregion : fourth approximation - Willoughby, Michael, 1959 - (Alberta Environment, Lands and Forest Services, 2001)

Range plant community types and carrying capacity for the montane subregion : second approximation - Willoughby, Michael, 1959 - (Alberta Environmental Protection, Lands and Forest Services, 1997)

Range plant community types and carrying capacity for the subalpine and alpine subregions : second approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands Division, 2003)

Range plant community types and carrying capacity for the subalpine and alpine subregions : third approximation - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Public Lands Division, 2006)

Range plant community types and carrying capacity for the subalpine and alpine subregions : first approximation - Willoughby, Michael, 1959 - (Alberta Environmental Protection, Lands and Forest Services, 1999)

Range plant handbook - Dayton, William A. (William Adams), 1885 - (U. S. Govt. print. off, 1937)

Range plant handbook - Dayton, William A. (William Adams), 1885 - (U.S. Govt. print. off, 1937)

Rare plant inventory and plant community descriptions of the Sweet Grass Hills, Proposed Area of Critical Environmental Concern (PACEC), Toole and Liberty Counties, Montana - United States. Bureau of Land Management. (Western Technology and Engineering, Inc, 1989)

A rare plant survey of the Wainwright Dunes Ecological Reserve - Alberta. Alberta Sustainable Resource Development. (Alberta Sustainable Resource Development, Resource Data Branch, Public Lands Division, 2003)

Reading Naturalist. Reading - Reading Natural History Society. (1960)

Reading Naturalist. Reading - Reading Natural History Society. (1971)

Reading Naturalist. Reading - Reading Natural History Society. (1975)

Reading Naturalist. Reading - Reading Natural History Society. (1977)

Report - British Columbia Provincial Museum. (Printed by W.H. Cullin, 1942)

Report - British Columbia Provincial Museum. (Printed by W.H. Cullin, 1933)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1895)

Report / Botanical Exchange Club and Society of the British Isles - Botanical Exchange Club; Society of the British Isles. (1901)

Report / Botanical Exchange Club and Society of the British Isles - Botanical Exchange Club; Society of the British Isles. (1912)

Report / Botanical Exchange Club and Society of the British Isles - Botanical Exchange Club; Society of the British Isles. (1913)

Report / Botanical Exchange Club of the British Isles - Botanical Exchange Club of the British Isles. (1888)

Report / Botanical Exchange Club of the British Isles - Botanical Exchange Club of the British Isles. (1889)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1916)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1917)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1920)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1923)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1926)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1928)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1929)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1935)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1938)

Report / Botanical Society and Exchange Club of the British Isles - Botanical Society; Exchange Club of the British Isles. (1945)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1926)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1904)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1901)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1907)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1912)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1913)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1914)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1896)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1901)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1909)

Report of the State Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, 1916)

Report of the state botanist for 1924 - New York (State). Botanist. (University of the State of New York, 1925)

Report of the State Entomologist on injurious and other insects of the state of New York - Felt, Ephraim Porter, 1868 -1943 (Weed, Parsons and Co.; University of the State of New York, 1921)

Report of the Watson Botanical Exchange Club - Watson Botanical Exchange Club. (1884)

Report of the Watson Botanical Exchange Club - Watson Botanical Exchange Club. (1916)

Report of the Watson Botanical Exchange Club - Watson Botanical Exchange Club. (1929)

Reports of the Survey. Botanical series - Geological; Natural History Survey of Minnesota. (1892)

Western Australian Herbarium Research Notes - Western Australia. Department of Biodiversity, Conservation; Attractions (Western Australian Herbarium, 1980)

Restoration guidelines for wetlands of the western Prairie Pothole Region - United States. Environmental Protection Agency. (Montana Natural Heritage Program, 2012)

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1915)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1916)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1917)

The Review of applied entomology. Series A, Agricultural - C.A.B. International. Bureau of Crop Protection (Commonwealth Agricultural Bureaux, etc, 1921)

Review of applied mycology - Commonwealth Mycological Institute, Kew, Eng. (Commonwealth Mycological Institute, 1922)

Review of applied mycology - Commonwealth Mycological Institute, Kew, Eng. (Commonwealth Mycological Institute, 1923)

Revised checklist of New York State plants - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1997)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 1977)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 2005)

Revue suisse de zoologie - Muséum d'histoire naturelle de Genève. (Kundig [etc.], 2010)

Rhizome recruitment of Calamagrostis canadensis into mounds created for tree seedling establishment : final report 1997 - Alberta. Alberta Environmental Protection. (Alberta Environmental Protection, 1997)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1910)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1912)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1915)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1916)