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- Asher, Jim
- Asher, Karen
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- Asheville Seed Company.
- Ashford Park Nurseries.
- Ashford, Bailey K
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- Ashland College (Ashland, Ohio)
- Ashland Nursery,
- Ashland Oil, inc.
- Ashland University.
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- Ashley, Clifford W. (Clifford Warren), 1881-1947
- Ashley, D. A.
- Ashley, D. L.
- Ashley, E. Paul
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- Ashley, George (Botanist)
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- Ashmole, N Philip
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- Ashville Flower Fields.
- Ashwell, Diana
- Ashwell, Elizabeth
- Ashwell, K. W. S.
- Ashwood, Tom L.
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- Asia (magazine)
- Asiain Alvarez, Julieta.
- Asiatic Herpetological Research Society.
- Asiatic Museum (Calcutta, India)
- Asiatic Society (Kolkata, India)
- Asiatic Society of Bengal
- Asiatic Zoölogical Expedition of the American Museum of Natural History (1st : 1916-1917)
- Asiatic Zoölogical Expedition of the American Museum of Natural History (2nd :1918-1919)
- Asimakis, Elias
- Asinelli, Marta Eglaé Camargo
- Asis, Josep D
- Asis, Josep Daniel
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- Askari, Ahmad
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- Askoy Expedition (1941-1945)
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- Aslan, Ali
- Aslan, Clare E.
- Aslan, Ebru Gul
- Aslan, Irfan
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- Aslin, Heather J
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- Asmus, Haraldo Erwin
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- Asociación Argentina de Ciencias Naturales.
- Asociación Colombiana para el Avance de la Ciencia,
- Asociación de Labradores de Zaragoza.
- Asociación Latinoamericana de Botánica,
- Asociación Ornitológica del Plata
- Asociación Peruana para el Progresso de las Ciencia.
- Asociación salitrera de propaganda, Iquique, Chile.
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- Asorey, Cynthia M
- Asotra, Satish
- Asoyama, S
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- Aspelin, Elias, 1721-1795
- Aspelund, Trond
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- Asphalt Roof Coating Co.
- Aspillaga, Eugenio
- Aspinall, Phil.
- Aspinall, R. J.
- Aspinwall, D. R.
- Aspinwall, Dylan
- Aspizua, Rut
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- Assembly of Mathematical and Physical Sciences (U.S.). Naval Studies Board.
- Assemian, N’guessan Emmanuel
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- Assis, Elton Luis Monteiro de
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- Assis, Glaucy Takeda
- Assis, Helena C. Silva de
- Assis, Jorge
- Assis, José Eriberto de
- Assis, José Geraldo de Aquino
- Assis, José Santino de
- Assis, Juliana C. F. de
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- Associated agricultural convention Boston) 1851-
- Associated Bulb Growers Of Holland,
- Associated Dahlia Growers.
- Associated fanciers.
- Associated Seed Growers, Inc.
- Associated Seeds, Inc.
- Associated Seeds, Inc. (San Antonio, Tex.)
- Associates of the National Agricultural Library.
- Association amicale des élèves et anciens élèves de la Faculté des sciences de l'Université de Paris.
- Association Britannique pour l'avancement des sciences.
- Association de la protection des forêts de la province de Québec. Convention Montréal, Québec) 1918-
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- Association Des Anatomistes.
- Association des naturalistes de Levallois-Perret.
- Association for Promoting the Discovery of the Interior Parts of Africa.
- Association for the Advancement of Women.
- Association for the Aid of Crippled Children.
- Association for the Protection of Sea Birds on the English Coast.
- Association for the Relief of the Manufacturing and Labouring Poor (London, England)
- Association for the Sciences of Limnology and Oceanography
- Association for the Study of Internal Secretions (U.S.)
- Association forestière canadienne. Convention Montréal, Québec) 1908-
- Association forestière canadienne. Convention Ottawa, Ont.) 1906-
- Association française pour l'avancement des sciences.
- Association française pour l'avancement des sciences. Congrès Reims, France) 1880-
- Association horticole lyonnaise.
- Association internationale des botanistes.
- Association of American Agricultural Colleges and Experiment Stations.
- Association of American Agricultural Colleges and Experiment Stations. Commission on agricultural research.
- Association of American Agricultural Colleges and Experiment Stations. Convention.
- Association of American agricultural colleges and experiment stations. Executive committee.