Thirty-second supplement to the American Ornithologists' Union check-list of North American birds.
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| Format: | Book |
| Language: | English |
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[Baltimore, Md.] :
[publisher not identified],
1973.
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| Item Description: | Reprinted from The Aux; volume 90, number 2, April 13, 1973. |
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| Physical Description: | pages 411-419. ; 24 cm. |