1,104 titles (books/journals)
4,905 volumes
2,113,184 pages
232,055 links to protologues
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- A. Bettesworth and J. Batley.
- Abbot, John,
- Abert, J. W.
- Abildgaard, Nicolai,
- Acad. M. Swederi.
- AcadeÌmie des sciences (France)
- AcadeÌmie internationale de geÌographie botanique.
- AcadeÌmie royale des sciences, des lettres et des beaux-arts de Belgique.
- Academia Caesareo-Leopoldina Naturae Curisorum.
- Academia Médico-Quirúrgica (Puebla Mexico)
- Academia Nacional de Ciencias (Córdoba, Argentina)
- Academiae Caesareae Leopoldino-Carolinae.
- Academiae Caesareae Scientiarum.
- Académie malgache.
- Académie royale des sciences, des lettres et des beaux-arts de Belgique.
- Academy of Natural Sciences of Philadelphia.
- Academy of Science of St. Louis.
- Accademia gioenia di scienze naturali in Catania
- Ackermann, Johann Christian Gottlieb,
- Acosta, Cristóbal,
- Adam Islip, Joice Norton, Richard Whitakers.
- Adanson, Michel,
- Adelphus, Johannes,
- Aejmelée, Christer,
- Agardh, C. A.
- Agassiz, Louis,
- Ahlberg, Carl Gustaf.
- Aiton, William,
- Akademie der Wissenschaften in Göttingen
- Akademie der Wissenschaften in Wien
- Akademja Umiejętności w Krakowie
- Albertus,
- Albrecht, Ignatz.
- Alcionio, Pietro,
- Alexandre, Nicolas,
- Allais, Louis Jean,
- Alleizette, Charles d'.
- Allen, J. A.
- Allen, John Fisk.
- Allport, Thomas.
- Almeloveen, Theodoor Jansson ab,
- Alpini, Alpino,
- Alpini, Prosper,
- Amador de los Rios, José,
- American Academy of Arts and Sciences.
- American Fern Society.
- American Philosophical Society.
- Amman, Johann,
- Andreae Wecheli.
- Andrews, Henry Charles,
- Andromachus,
- Antoine, Franz,
- Arago, Jacques,
- Arch, John, & Arthur.
- Arckenhaugen.
- Arckenhausen.
- Aretius, Benedictus,
- Aristotle
- Arnam, Steven.
- Arnold Arboretum.
- Arnott, George A. Walker
- Arthur, Joseph Charles,
- Arthus Bertrand.
- Asiatic Society (Calcutta, India)
- Association française pour l'avancement des sciences.
- Atkinson & Alexander.
- Aublet, Fusée
- Aubriet, Claude,
- Audebert, J. B.
- Aurell, August,
- Austin, Edward Payson.
- Australian Museum.
- Averroës,
- Axenborg, Pehr.