On certain secondary sexual characters in the male ruddy duck, Erismaturajamaicensis (Gmelin)
- 1 January 1917
- journal article
- Published by Smithsonian Institution in Proceedings of the United States National Museum
- Vol. 52 (2191) , 479-482
- https://doi.org/10.5479/si.00963801.52-2191.479
Abstract
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