- African Bird Club.
- African Conservation Fund and Uaso Ngiro Baboon Project
- African Expedition of the American Museum of Natural History (1912-1913)
- African Research Survey.
- African Violet Nursery,
- African Violet Society of America.
- Afshan, N S
- Afshan, Najam-Ul-Sahar
- Afshar-Harb, Abbas
- Afshari, Fatemehi
- Afshari, Naghmeh
- Afton, Alan D
- Afuang, Leticia E
- Afuso, K
- Afzal, Mohammad.
- Afzal, Muhammad, 1902-
- Afzal-Rafii, Zara
- Afzan, Hanan
- Afzelius, Adam, 1750-1837
- Afzelius, Björn A
- Afzelius, Johan Arvid, 1802-1892
- Aga, Alton
- Agacino, E Morales
- Agadjanian, Alexander
- Agafitei, Nancy J
- Agafonov, Alexander
- Agamennone, Franco
- Agan, Ahto
- Agapov, S. P.
- Agar, K.
- Agar, Madeline.
- Agar, W. E. (Wilfred Eade), 1882-1951
- Agar, William MacDonough, 1894-
- Agard, David B.
- Agardh, C. A. (Carl Adolf), 1785-1859
- Agardh, C. S.
- Agardh, Jacob Georg, 1813-1901
- Agarez, Fernando Vieira
- Agarwal, Anil K.
- Agarwal, Anil Kumar
- Agarwal, Annu.
- Agarwal, G P
- Agarwal, Ishan
- Agarwal, M K
- Agarwal, M L
- Agarwal, Man Mohan
- Agarwal, Ram Autar 1925-2019
- Agarwal, S M
- Agarwal, V B
- Agarwala, Basant K.
- Agashe, Shripad N
- Agassiz Association.
- Agassiz Association. Department of the Wilson Chapter.
- Agassiz Association. Wilson Ornithological Chapter.
- Agassiz, A
- Agassiz, Alexander, 1835-1910
- Agassiz, David J. L.
- Agassiz, Elizabeth Cabot Cary, 1822-1907
- Agassiz, George R. (George Russell), 1862-1951
- Agassiz, Louis, 1807-1873
- Agazzi, G
- Agbagwa, Ikechukwu O
- Agbodzavu, Mawufe
- Agbovic, T.
- Agboyi, Lakpo Koku
- Agee, Alva, 1858-1943
- Agee, Herndon R., 1933-
- Agenbroad, Larry D
- Agenonga, Upoki
- Ager, D V
- Ager, Derek V
- Ager, L A
- Agerer, Reinhard
- Agersborg, H. P. K. (Helmer Pareli Kjerschow), 1881-1960
- Agerson, Kirk
- Agerter, Sharlene R.
- Ageton, Charles Norman, 1883-1928
- Aggarwal, Ramesh Kumar
- Aggarwal, Rita.
- Aggeler & Musser Seed Co.
- Aggundey, Issa R.
- Agha, Mickey
- Aghanabati, Seyed Ali
- Aghnaj, A
- Aglietti, Chiara
- Agnarsson, Ingi
- Agne, Carlos Eduardo
- Agnes A. Wheeler (Firm)
- Agnesi, Sabrina
- Agnethler, Michael Gottlieb, 1719-1752
- Agnew, A. D. Q. (Andrew David Quentin), 1929-
- Agnew, Charles W.
- Agnew, D Hayes
- Agnew, G.
- Agnew, J. B.
- Agnew, James Wilson
- Agnew, Noel V. I.
- Agnew, Philip.
- Agnihotri, Meena
- Agnihotri, Priyanka
- Agnolin, Federico L
- Agnolín, Federico L.
- Agnusdei, Mónica
- Agopian, Silvia Susana
- Agoramoorthy, Govindasamy
- Agosin, E
- Agosta, Salvatore J.
- Agosti, Donat
- Agostinho, Ângelo Antônio
- Agostinho, Carlos Sérgio, 1966-
- Agostinho, Sonia
- Agostini Vasconcellos, Marina Beatriz
- Agostini, Adela
- Agostini, Diego
- Agostini, Getulio, 1943-1990
- Agostini, María Gabriela
- Agostini, Nicolantonio
- Agostino-Andrea, Matías Emanuel Dileo
- Agra, Leandro de Almeida Neves Nepomuceno
- Agra, Maria de Fátima
- Agrain, Federico
- Agramon-Romero, Samuel
- Agrawal, B M
- Agrawal, M C
- Agrawal, V C
- Agrawala, D. K., 1976-
- Agricola, Georg Andreas, 1672-1738
- Agricola, Georg, 1494-1555
- Agricultural & Horticultural Society of India.
- Agricultural and Arts Association of Ontario.
- Agricultural and Industrial Exhibition Baddeck, N.S.) 1880-
- Agricultural and Industrial Exhibition Toronto, Ont.) 1879-
- Agricultural and Industrial Exhibition Association of Toronto.
- Agricultural and Mechanical College of Alabama. Agricultural Experiment Station.
- Agricultural Conference, Malaya Kuala Lumpur, Malaysia) 1917-
- Agricultural Laboratories Inc.
- Agricultural Research Center (Beltsville, Md.)
- Agricultural Research Center-West (U.S.). Northeastern Region.
- Agricultural Research Institute (India)
- Agricultural Research Institute and College (India)
- Agricultural Research Policy Advisory Committee. National Planning Committee.
- Agricultural Research Policy Advisory Committee. Research Classification Subcommittee.
- Agricultural Seed Company (St. Louis, Mo.)
- Agricultural Society in Canada.
- Agricultural Society of Herefordshire.
- Agricultural Society of South Carolina.
- Agricultural society of St. James, Santee, S. C.
- Agricultural Society of Trinidad and Tobago.
- Agricultural Survey of South-Carolina.
- Agricultural Workers Industrial Union.
- Agricultuur Chemisch Laboratorium.
- Agripino, Débora Gomes
- Agri-Plast Products Company,
- Agro, David J
- AGS, Inc.
- Aguado Odina, María Teresa, 1956-
- Aguado Suárez, Inmaculada
- Aguado, María Inmaculada
- Aguado, N.
- Aguado, Pablo
- Aguado, Roque
- Aguado-Bautista, Óscar
- Aguayo Lobo, Anelio
- Aguayo Quilodran, Orlando
- Aguayo, C G
- Aguayo, Jaime
- Aguayo, M.
- Aguayo, Mario
- Aguayo, Mauricio
- Aguayo, Paula A.
- Aguayo, Ricardo C.
- Aguayo, Rodrigo.
- Aguayo, Sonia
- Aguayo-Salinas Salvador
- Agudelo M, Juan Carlos
- Agudelo R., Antonio Arnovis.
- Agudelo, Ana Cristina
- Agudelo, Maria I
- Agudelo-Valderrama, Olga Lucía
- Agudelo-Zamora, Henry D.
- Agueda Castro, María
- Aguera, Antonio
- Agüero Alcarás, Martín
- Agüero, Gloria.
- Aguerre, Gimena
- Aguesse, P.
- Aguiar Santos, Antenor
- Aguiar Wolter, Esther L.
- Aguiar, Alexandre P. (Alexandre Pires), 1967-
- Aguiar, Aline
- Aguiar, Ana P. N.
- Aguiar, Ana.
- Aguiar, António
- Aguiar, Antonio J. C.
- Aguiar, Antonio M F
- Aguiar, António Miguel Franquinho 1960-
- Aguiar, Candida Maria Lima
- Aguiar, Carlos A S
- Aguiar, Carlos Francisco Gonçalves
- Aguiar, Cristina D. M.
- Aguiar, D. M.
- Aguiar, Ducineia Barros
- Aguiar, Eleonora
- Aguiar, Francismar Francisco Alves
- Aguiar, Gabriela
- Aguiar, Gilberto F. Souza
- Aguiar, Guillermina
- Aguiar, Hiton Jeferson Alves Cardoso de.
- Aguiar, Ivor Bergemann de
- Aguiar, Izonete de Jesus Araújo
- Aguiar, JAB.
- Aguiar, Jaime Paiva Lopes.
- Aguiar, José Otávio
- Aguiar, Kurazo Mateus Okada
- Aguiar, Laurenia Maria Braga de Albuquerque
- Aguiar, Leila M. G.
- Aguiar, Leonardo J. G.
- Aguiar, Lucas M.
- Aguiar, Ludmilla Moura de Souza.
- Aguiar, Luis Felipe Schmidt De
- Aguiar, Madalena Otaviano
- Aguiar, Martín R
- Aguiar, Mônica C. A.
- Aguiar, Nair Otaviano
- Aguiar, Osny Tadeu
- Aguiar, Polyanne
- Aguiar, Regina Lúcia Félix de
- Aguiar, Sebastián
- Aguiar, Shesterson
- Aguiar, Sonia
- Aguiar, Theresa A.
- Aguiar, Willian Moura de
- Aguiar-Coelho, Valéria Magalhães
- Aguiar-Dias, Ana Cristina Andrade de.
- Aguiari, Juliana Flor de
- Aguiar-Menezes, E. L.
- Aguiar-Oliveira Elizama
- Aguiar-Perecin, Margarida L. R.
- Aguiar-Silva, FH.
- Aguiar-Silva, Francisca
- Aguieiras, Marcia
- Aguilar Caballero, R.
- Aguilar Contreras, Abigail
- Aguilar Fernández, Reinaldo
- Aguilar Palomino, Bernabe
- Aguilar Puentes, Mauricio.
- Aguilar Rosas, Luis E.
- Aguilar Rosas, Luis Ernesto,
- Aguilar Sierra, Verónica
- Aguilar Ubeda, Alejandra