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- American Chemical Society 1
- American coot 14
- American crow 34
- American exchange rate options 2
- American football 1
- American golden-plover 8
- American goldfinch 59
- American Indians 1
- American kestrel 6
- American mink -- Physiology 1
- American oystercatcher 3
- American pipit 2
- American redstart 68
- American Revolution 1
- American robin 343
- American Science-Fiction 1
- American tree sparrow 23
- American wigeon 3
- American woodcock 8
- Americanismo cientÃfico 1