- American Museum of Natural History. Department of Vertebrate Paleontology.
- American Museum of Natural History. Employees' Benefit Association.
- American Museum of Natural History. Jesup Collection.
- American Museum Of Natural History. Southwestern Research Station.
- American Museum of Natural History. Trustees.
- American Museum Of Natural History-Lamont Geological Observatory Expeditions 1955-1962
- American Museum of Natural History-Lamont Geological Observatory Expeditions (1955-1962)
- American Museum of Natural History-National Museum of Canada Expedition (1961-1962)
- American Museum Yukon Territory-Alaskan Expedition (1936)
- American Museum-Bolivian Expeditions 1963-1965
- American Museum-Bolivian Expeditions (1963-1965)
- American Museum-Hispaniola Expedition (1935)
- American Museum-Terramar Expedition (1994-1995)
- American Museum-Terramar Expedition (1995)
- American Mutual Seed Co.
- American Naturalist
- American Nature Study Society.
- American Nursery Co.
- American Nursery Company.
- American Orchid Society,
- American Ornithologists' Union.
- American Ornithologists' Union. Committee on Classification and Nomenclature.
- American Park and Outdoor Art Association.
- American Pekin Duck Company, Boston.
- American Peony Society.
- American Perennial Gardens,
- American Petroleum Institute.
- American Philosophical Society.
- American Physiological Society (1887- )
- American Phytopathological Society.
- American Phytopathological Society. Fungicide Committee. Subcommittee on Testing and Results of Newer Fungicides.
- American Phytopathological Society. Middle Atlantic States Section.
- American Phytopathological Society. War Emergency Committee.
- American Plant & Seed Co.
- American Plant Life Society.
- American Polled Shorthorn Society
- American Pomological Congress.
- American Pomological Society.
- American Poultry Association.
- American poultry publishing Co.
- American Poultry Publishing Company.
- American Poultry School.
- American Poultry Show.
- American Public Health Association.
- American Public Health Association. Sanitary Engineering Section.
- American Rabbit Breeders Association.
- American Rock Garden Society.
- American Rose and Plant Company (Springfield, Ohio)
- American Rose Society.
- American school of home economics, Chicago.
- American School of Home Economics.
- American Seed & Plant Co.
- American Seed & Plant Company,
- American Seed and Seedtape Company.
- American Seed Co. (Detroit, Mich.)
- American Seed Company (Detroit, Mich.)
- American Seed Company (Fort Worth, Tex.)
- American Seed Company (St. Louis, Mo.)
- American Seed Company.
- American Seed Corp.
- American Seed Garden.
- American seedtape company.
- American Shearer Manufacturing Co.
- American sheep breeder company, Chicago.
- American Shorthorn Breeders' Association.
- American Social Health Association.
- American Social Hygiene Association.
- American Society for Biochemistry and Molecular Biology.
- American Society for Horticultural Science.
- American Society for Microbiology.
- American Society for Quality Control.
- American Society of Agronomy.
- American Society of Biological Chemists.
- American Society of Ichthyologists and Herpetologists
- American Society Of Ichthyologists And Herpetologists. Meeting Lawrence, Kan.) 1965-
- American Society of Ichthyologists and Herpetologists. Nomenclature Committee.
- American Society Of Ichthyologists And Herpetologists. Panel on Systematic Problems in Cnemidophorus.
- American Society of Landscape Architects.
- American Society of Mammalogists.
- American Society of Mechanical Engineers.
- American Society of Mechanical Engineers. Biomechanical and Human Factors Division.
- American Society Of Microscopists.
- American Society of Naturalists.
- American Society of Parasitologists
- American Society of Plant Physiologists.
- American Society of Plant Taxonomists.
- American Society of Zoologists.
- American Society Of Zoologists. Meeting Atlanta, Ga.) 1991-
- American Society of Zoologists. Meeting (1991 : Atlanta, Ga.)
- American Spawn Company (Saint Paul, Minn.)
- American Spawn Company (St. Paul, Minn.)
- American Spawn Company.
- American squab breeders association.
- American Statistical Association.
- American Steel & Wire Co.
- American Sunday-School Union.
- American Supply Company (Quincy, Ill.)
- American Supply Company,
- American Telephone and Telegraph Company.
- American Tract Society.
- American Tree Association.
- American Trust and Savings Bank, Cedar Rapids, Ia.
- American turf congress.
- American University of Beirut.
- American Veterinary Medical Association
- American Water Resources Association.
- American Wood-Preservers' Association.
- American-Canadian fisheries conference.
- American-Honduras Company.
- American-Scandinavian Foundation.
- Amerikaansche Consul ingediend aan hunne Regeering.
- Amerine, M. A. 1911-
- Amerman, Kenneth E.
- Améro, Constant.
- Amerson, A. Binion
- Amery, C F
- Ames Agricultural Implement Co.
- Ames Agricultural Implement Company.
- Ames Botanical Laboratory.
- Ames Plow Company.
- Ames Research Center.
- Ames, Aaron.
- Ames, Alfred H.
- Ames, Blanche
- Ames, C. H.
- Ames, Charles G
- Ames, Charles T.
- Ames, Eileen
- Ames, J. H.
- Ames, John.
- Ames, Kenneth M
- Ames, L. M.
- Ames, Mary E. Pulsifer, 1845-1902
- Ames, Mercedes
- Ames, Oakes, 1874-1950
- Ames, Oliver
- Ames, Peter L
- Ames, Ralph W.
- Ametrang, Silvia
- Amevoin, Komina
- Amey, Andrew P.
- Amezcua, Ana
- Amezcua, Felipe
- Amezcua, José Manuel Ramírez
- Améziane-Cominardi, Nadia
- Amézquita, Adolfo
- Amherst College.
- Amherst Nurseries.
- Amherst Patagonian Expedition (8th : 1911)
- Ami, Henry M. (Henry Marc), 1858-1931
- Amiadi, S R
- Amich García, Francisco Manuel
- Amich, Francisco
- Amici, Andrea
- Amici, Giovanni Battista, 1786-1863
- Amico, Guillermo C.
- Amidon, Elliot L.
- Amidon, Frederick A
- Amiet, Félix
- Amiet, Jean-Louis
- Amiet, J-L
- Amigo, Javier.
- Amigo, Xavier.
- Amin, Bhailal M.
- Amin, Omar M
- Amin, Oscar
- Amina, Poovoli
- Amini, Vajihe
- Amiotti, Nilda
- Amir, Nava
- Amir, T
- Amirault, Diane Louise
- Amiri, Neda
- Amirmijani, Amirreza
- AMIROUCHE, Nabila
- AMIROUCHE, Rachid
- Amirthalingam, C
- Amity Gardens.
- Amla, D V
- Amla, Devindra V
- Amladi, S R
- Amman, Brian R.
- Amman, Gene D.
- Amman, Hans.
- Amman, Johann, 1707-1742
- Amman, Jost, 1539-1591
- Ammann, Klaus
- Ammann, Morgane
- Ammann, Sara
- Ammar, Dib
- Ammer, Christian
- Ammer, F K
- Ammerman, C B
- Ammerman, Loren K.
- Ammidown, L E
- Ammidown, Lucius E
- Ammirati, Joseph F
- Ammon, Friedrich August von, 1799-1861
- Ammon, Ludwig von, 1850-1922
- Ammons, Andy
- Ammons, E. M.
- Ammons, Nelle P. 1889-
- Amo y Mora, Mariano del, 1820-1896
- Amoco Production Company.
- Amole, Ira R.
- Amon, Diva
- Amon, Edward O
- Amor, B K
- Amor, Juan Valdivieso
- Amor, M J
- Amor, Maria Jose
- Amor, R L
- Amora, Gizelle
- Amora-Lazcano, E.
- Amoreux, Pierre Joseph, 1741-1824
- Amori, G
- Amori, Giovanni
- Amorim, Alberto Ferreira de.
- Amorim, André Márcio Araújo
- Amorim, Bruno S
- Amorim, Dalton de Souza, 1958-
- Amorim, Elba Lúcia Cavalcanti de
- Amorim, F. O.
- Amorim, Fabiana Oliveira de
- Amorim, Felipe Wanderley
- Amorim, Fernanda Alves de
- Amorim, Francismare de O.
- Amorim, Heyde Polyana
- Amorim, Isaac Lucena de
- Amorim, Ismael Rafane
- Amorim, Juliane dos Santos
- Amorim, Karlla Danielle Jorge Karlla Danielle Jorge Amorim
- Amorim, Luciana C. de.
- Amorim, M. de Freitas.
- Amorim, Marcelo Andrade
- Amorim, Marinete
- Amorim, Maristela Ascenção
- Amorim, ME.
- Amorim, P. K.
- Amorim, Paulo Atlântico Figueiredo de
- Amorim, Pedro
- Amorim, R. B.
- Amorim, Rodrigo César das Neves
- Amorim, RV.
- Amorim, Solange Maria Costa de
- Amorim, Thiago Azevedo
- Amorocho, Diego F.
- Amoros, C
- Amorós, Carlos D.
- Amoroso, L.