Quaestiones entomologicae - University of Alberta. Dept. of Entomology. (Dept. of Entomology, University of Alberta, 1978)

Quarterly journal of the Florida Academy of Sciences - Florida Academy of Sciences. (Florida Academy of Sciences, 1952)

Rapid biological inventories - Field Museum of Natural History. Environmental; Conservation Programs. (Field Museum, 2006)

Rapid inventories, biological and social - Field Museum of Natural History. (Field Museum, 2008)

Rare and Threatened Plants of Cuba: ex-situ conservation in Botanic gardens (1989)

Recent advances in cytology - Darlington, C. D. (Cyril Dean), 1903 - (P. Blakiston's son & co., inc, 1937)

Records of the Auckland Institute and Museum - Auckland Institute; Museum. (Auckland Institute and Museum, 1935)

Records of the Auckland Institute and Museum - Auckland Institute; Museum. (Auckland Institute and Museum, 1942)

Records of the Auckland Institute and Museum - Auckland Institute; Museum. (Auckland Institute and Museum, 1970)

Records of the Auckland Institute and Museum - Auckland Institute; Museum. (Auckland Institute and Museum, 1987)

Records of the Botanical Survey of India - Botanical Survey of India. (Office of Supt. of Govt. Print., India, 1912)

Records of the Queen Victoria Museum Launceston - Queen Victoria Museum (Launceston, Tas.) (The Museum, 1977)

Records of the Queen Victoria Museum Launceston - Queen Victoria Museum (Launceston, Tas.) (The Museum, 1984)

Recueil des travaux botaniques néerlandais - Koninklijke Nederlandse Botanische Vereniging. (Société botanique néerlandaise, 1910)

Règles internationales de la nomenclature botanique adoptées par le Congrès international de botanique de Vienne, 1905 = International rules of botanical nomenclature adopted by the International Botanical Congresses of Vienna, 1905 and Brussels, 1910 = Internationale Regeln der botanischen Kongressen zu Wien 1905 und Bruüssel 1910 - Briquet, John, 1870 -1931 (G. Fischer, 1912)

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

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

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, 1916)

Report of the Pennsylvania Department of Forestry, for the years ... - Pennsylvania. Department of Forestry. (Harrisburg Pub. Co., state printer, 1905)

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

Report on forests - Geological Survey of New Jersey. (MacCrellish & Quigley, 1900)

Report on the geology, mineralogy, botany, and zoology of Massachusetts : made and published by order of the government of that state : in four parts: Part I. Economical geology. Part II. T opographical geology. Part III. Scientific geology. Part IV. Catalogues of animals and plants : with a descriptive list of the specimens of rocks and minerals collected for the government : illustrated by numerous wood cuts and an atlas of plates - Massachusetts. Geological Survey. (Press of J.S. and C. Adams, 1833)

Report on the geology, mineralogy, botany, and zoology of Massachusetts - Massachusetts. Geological Survey. (Press of J.S. and C. Adams, 1833)

Report on the geology, mineralogy, botany, and zoology of Massachusetts - Massachusetts. Geological Survey. (J.S. and C. Adams, 1835)

A report upon the boreal flora of the Sierra Nevada of California - Smiley, Frank Jason, 1880 - (University of California Press, 1921)

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

Reports on the herbaceous plants and on the quadrupeds of Massachusetts - Dewey, Chester, 1784 -1867 (Folsom, Wells, and Thurston, 1840)

Research about: Herbs, shrubs and vegetation in Turkestan; Grazing in Turkestan; Results of grazing in Turkestan [and] Various plant migrations in Turkestan - United States. Forest Service. (U.S. Govt. Print. Off, 1932)

Western Australian Herbarium Research Notes - Western Australia. Department of Biodiversity, Conservation; Attractions (Western Australian Herbarium, 1979)

Western Australian Herbarium Research Notes - Western Australia. Department of Biodiversity, Conservation; Attractions (Western Australian Herbarium, 1981)

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

Results of the first Joint US-USSR Central Pacific Expedition (BERPAC) : Autumn 1988 - U.S. Fish; Wildlife Service (U.S. Fish and Wildlife Service, 1992)

A revision of Bastin's College botany for the use of students of pharmacy - Bastin, Edson S. (Edson Sewell), 1843 -1897 (G. P. Engelhard & co, 1920)

Revision of the North American plant bug genus Megalopsallus Knight : with the description of eight new species from the West (Heteroptera, Miridae, Phylinae) - Schuh, Randall T. (American Museum of Natural History, 2000)

Revista de la Academia Canaria de Ciencias - Academia Canaria de Ciencias. (Academia Canaria de Ciencias, 2000)

Revue bryologique et lichenologique - Muséum national d'histoire naturelle (France) (Museum national d'histoire naturelle, 1979)

Revue des questions scientifiques - Société scientifique de Bruxelles. (Société scientifique de Bruxelles, 1923)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1904)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1907)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1940)

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

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

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

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1977)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1978)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1981)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1989)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1992)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1997)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1998)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2000)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2002)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 2003)

ri ben zhi wu ming hui - Honda, Masaji 本田正次 1897 -1984 (san sheng tang)

Rio Blanco Oil Shale Project. Tract C-a / [c]by Rio Blanco Oil Shale Project. no.8, Progress report - CDM/Limnetics. (Rio Blanco Oil Shale Project, 1974)

Rivista italiana di paleontologia - Fornasini, Carlo. (Rivista italiana di paleontologia, 1901)

Rivista italiana di scienze naturali : periodico mensile premiato alle esposizioni nazionali di Palermo e di Milano ed a quella internazionale di Chicago (Ufficio, 1906)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1948)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1949)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1950)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1976)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1979)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1980)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1984)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1985)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2000)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2001)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2002)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2003)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2006)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2007)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2008)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2010)

Roosevelt wild life bulletin ... of the Roosevelt Life Forest Experiment Station of the New York College of Forestry at Syracuse University - New York State College of Forestry at Syracuse University. Roosevelt Wild Life Forest Experiment Station. (The University, 1940)

Samen-Tauschliste - Schwabe, Willmar. (Arzneipflanzen-Lehr- und Versuchsgarten des wissenschaftlichen Laboratoriums Dr. Willmar Schwabe, 1941)

Samen-Tauschverzeichnis des Botanschen Gartens der Universität Graz - Universität Graz. Botanischer Garten. (Verlag des Instituts für systematische Botanik der Universität Graz, 1937)

Samen-Tauschverzeichnis des Botanschen Gartens der Universität Graz - Universität Graz. Botanischer Garten. (Verlag des Instituts für systematische Botanik der Universität Graz, 1939)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1931)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1932)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1933)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1934)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1936)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1937)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1938)

Samen-Verzeichnis des Botanischen Gartens der Stadt Köln am Rhein - Flora und Botanischer Garten Köln. ([Flora und Botanischer Garten Köln], 1939)

Samen-Verzeichnis des Botanischen Gartens der Universitãt Greifswald - Ernst-Moritz-Arndt-Universität Greifswald. Botanischer Garten. ([Botanischer Garten], 1893)

Samenverzeichnis - Botanischer Garten Kassel. (Botanischer Schulgarten, 1921)