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Subject
- Age determination2
- Agriculture3
- Aimophila1
- Alcidae2
- Amateurism1
- American Museum of Natural History. Dept. of Ornithology2
- American Ornithologists' Union1
- Anatidae11
- Animal tracks1
- Animal traps2
- Anseriformes1
- Archival resources2
- Archives2
- Art auctions1
- Artists6
- Artists' books2
- Audubon, John James, 1785-185129
- Bachman, John, 1790-18741
- Behavior19
- Beneficial birds1