Revisions of North American grasses - Chase, Agnes, 1869 -1963 (G.P.O, 1920)

Revisions of North American grasses - Chase, Agnes, 1869 -1963 (G.P.O, 1921)

Revisions of the North American bats of the family Vespertilionid[a]e - Miller, Gerrit S. Jr. (Gerrit Smith), 1869 -1956 (G.P.O, 1897)

Revista chilena de entomología - Sociedad Chilena de Entomología. (La Universidad, 1951)

Revista chilena de entomología - Sociedad Chilena de Entomología. (La Universidad, 1952)

Revista chilena de historia natural - Museo de Historia Natural de Valparaíso (Valparaíso, Chile) (Litografia e Impr. Industrial (F. Peters), 1907)

Revista de la Facultad de Letras y Ciencias - Universidad de La Habana. Facultad de Letras y Ciencias. (Universidad de La Habana, 1905)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1926)

Rhodora - Robinson, Benjamin Lincoln, 1864 -1935 (New England Botanical Club [etc.], 1967)

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

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1860)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1872)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1874)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1882)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1888)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1889)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1900)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1954)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1960)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1963)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1966)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1972)

Saguaroland Bulletin - Desert Botanical Garden (Ariz.) (Arizona Cactus and Native Flora Society, 1974)

SCAMIT newsletter - Southern California Association of Marine Invertebrate Taxonomists. (SCAMIT, 1999)

Science - American Association for the Advancement of Science. ([s.n.], 1900)

Science - American Association for the Advancement of Science. ([s.n.], 1902)

Science - American Association for the Advancement of Science. ([s.n.], 1903)

Science - American Association for the Advancement of Science. ([s.n.], 1906)

Science - American Association for the Advancement of Science. ([s.n.], 1913)

Science - American Association for the Advancement of Science. ([s.n.], 1915)

Science - American Association for the Advancement of Science. ([s.n.], 1916)

The Scientific monthly - American Association for the Advancement of Science. (American Association for the Advancement of Science [etc.])

Sea mosses : a collector's guide and an introduction to the study of marine Algae - Hervey, A. B. (Alpheus Baker), 1839 -1931 (S.E. Cassino, 1881)

Selected vertebrate endangered species of the seacoast of the United States - Biological Services Program (U.S.) (The Service : [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1980)

Semi-annual report of Schimmel & Co. (Fritzsche Brothers) - Schimmel & Co. (The Company, 1906)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1933)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1934)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1935)

Service and regulatory announcements - United States. Office of Experiment Stations. (U.S. G.P.O, 1936)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1987)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1994)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1996)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 1998)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 2000)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 2001)

SIDA, contributions to botany - Mahler, William F. (W. F. Mahler, etc.], 2006)

Significant Trade in Wildlife: a review of selected species in CITES Appendix II. Volume 3, Birds (1988)

Significant Trade in Wildlife: a review of selected species in CITES Appendix II. Volume 2: reptiles and invertebrates (1988)

Sinonimia vulgar y científica de las plantas mexicanas - Alcocer, Gabriel V., (Secretaría de Fomento, 1902)

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Geologie und Paläontologie - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Commission bei C. Gerold's Sohn, 1886)

Sitzungsberichte der Mathematisch-Naturwissenschaftliche Classe - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und StaatsDruckerei in Commission bei W. Braumüller, 1851)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 1972)

Smithsonian contributions to botany - Smithsonian Institution (Smithsonian Institution Press, 2014)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1976)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1991)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1999)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1869)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1864)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1875)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1877)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1879)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1880)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1882)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1896)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1913)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1920)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1935)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1936)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1942)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1943)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1949)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1951)