The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1919)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1921)

The Proceedings of the Iowa Academy of Science - Iowa Academy of Science (The Academy, 1922)

Proceedings of the Natural History Association of Miramichi - Natural History Association of Miramichi. (The Association, 1899)

Proceedings of the Newport Natural History Society - Newport Natural History Society. (The Society, 1884)

Proceedings of the Nova Scotian Institute of Science - Nova Scotian Institute of Science. (Nova Scotian Institute of Science, 1984)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1891)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1894)

Proceedings of the Rochester Academy of Science - Rochester Academy of Science. (The Academy, 1910)

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

Proceedings of the Staten Island Association of Arts and Sciences - Staten Island Association of Arts; Sciences. (The Association, 1906)

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.], 1890)

Proceedings of the United States National Museum - Smithsonian Institution (Smithsonian Institution Press, [etc.], 1927)

Prodromus florae argentoratensis - Spielmann, Jacob Reinbold, 1722 -1783 (Apud J.G. Bauerum, 1766)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1889)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1905)

A progress report on the investigations of the European corn borer - Caffrey, D. J. (U.S. Dept. of Agriculture, 1927)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1888)

A provisional host-index of the fungi of the United States - Farlow, W. G. (William Gilson), 1844 -1919 (1890)

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

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1910)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1915)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1920)

Psyche - Cambridge Entomological Club. (Cambridge Entomological Club, 1922)

Publication - Botanical Society of America. (The Society)

Publication. Field Columbian Museum. Botanical series - Field Columbian Museum. (Field Columbian Museum, 1896)

Publication. Field Museum of Natural History. Botanical series - Field Museum of Natural History. (Field Museum of Natural History, 1940)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1950)

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 plants : autumn, 1929 [catalog] - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Frank W. Campbell, 1929)

Rare wild flowers for pool borders and shaded areas - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Indian Crossing Nurseries, 1945)

Repertorium annuum literaturae botanicae periodicae - Bemmelen, J. A. van. (Erven Loosjes, 1873)

Report - Brush Hill Bird Club, Milton, Mass. (1914)

Report - New York (State). Board of General Managers of the Exhibit of the State of New York at the World's Columbian Exposition. (J. B. Lyon, 1894)

Report - British Columbia Provincial Museum. (Printed by W.H. Cullin, 1951)

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

Report intended to illustrate a map of the hydrographical basin of the upper Mississippi river - Torrey, John, 1796 -1873 (Blair and Rives, printers, 1843)

Report of a geological survey of Wisconsin, Iowa, and Minnesota;and incidentally of a portion of Nebraska Territory - United States. General Land Office (Lippincott, Grambo, 1852)

Report of a geological survey of Wisconsin, Iowa, and Minnesota : and incidentally of a portion of Nebraska Territory : made under instructions from the United States Treasury Department - United States. General Land Office. (Lippincott, Grambo & Co, 1852)

Report of botanical survey of southern and central Louisiana made during the year 1870 - Featherman, A. (Americus), 1822 - (Printed at the office of the Republican, 1871)

Report of the Botanical Department of the New Jersey Agricultural College Experiment Station - New Jersey Agricultural Experiment Station. (The Station, 1901)

Report of the Botanical Department of the New Jersey Agricultural College Experiment Station - New Jersey Agricultural Experiment Station. (The Station, 1906)

Report of the botanical exploration of southwestern Virginia during the season of 1892 - Small, John Kunkel, 1869 -1938 (1893)

Report of the Botanist - Peck, Charles H. (Charles Horton), 1833 -1917 (University of the State of New York, Office of the Regents, 1868)

Report of the Botanist - New York (State). State Botanist. (James B. Lyon, State Printer, 1867)

Report of the Geological Survey of Ohio - Geological Survey of Ohio. (Nevins & Myers, state printers, 1893)

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, 1905)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1906)

Report of the Michigan Academy of Science - Michigan Academy of Science. Council. (The Academy, 1911)

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 Museum of Natural History, Springfield, Massachusetts - Museum of Natural History (Springfield, Mass.) (The Museum, 1897)

Report of the State board of agriculture on the work of extermination of the gypsy moth - Massachusetts. State board of agriculture. (Wright & Potter printing co., state printers, 1893)

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, 1904)

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

Report on botanical work in Minnesota for the year 1886 - Arthur, Joseph Charles, 1850 -1942 (Pioneer Press Co, 1887)

Report on the botany of Barren and Edmonson counties - Hussey, John. 1831 -1888 (1876)

Report on the botany of Madison, Lincoln, Garrard, Washington, and Marion Counties, Kentucky - Kentucky. State Geologist. (Yeoman Press, 1882)

Report on the geology and agriculture of the State of Mississippi - Mississippi. State Geologist. (E. Barksdale, State Printer, 1860)

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... - United States National Museum (G.P.O, 1908)

Report upon United States Geographical surveys west of the one hundredth meridian - Geographical Surveys West of the 100th Meridian (U.S.) (G.P.O, 1878)

Reports of the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1891)

Reports of the Director ... - Dominion Experimental Farms; Stations (Canada) (Experimental Farms, 1887)

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

The Restigouche with notes especially on its flora - Natural History Society of New Brunswick. (s.n, 1896)

Résultats des campagnes scientifiques accomplies sur son yacht par Albert Ier, prince souverain de Monaco ... - Albert I, Prince of Monaco, 1848 -1922 (Impr. de Monaco, 1912)

Retail trade list. Spring, 1917 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Eastern Nurseries, 1917)

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

Revisio generum plantarum vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum, mit erläuterungen - Kuntze, Otto, 1843 -1907 (A. Felix [etc., etc.], 1891)

Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... - Kuntze, Otto, 1843 -1907 (A. Felix [etc.], 1891)

Revue de botanique; bulletin mensuel de la Société Française de Botanique - Société française de botanique. (Au secrétariat de la Société, 1887)

Revue horticole (Librairie agricole de la maison rustique, 1892)

Revue horticole (Librairie agricole de la maison rustique, 1896)

Revue horticole (Librairie agricole de la maison rustique, 1909)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1900)

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)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1917)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1919)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1924)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1925)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1930)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1931)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1937)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1941)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1942)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1948)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1953)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1957)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1958)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1969)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1972)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1973)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1976)