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Libros Libros 1 - 3 de 3 sobre Johnsgard, PA 1968. Waterfowl: their biology and natural history. University of Nebraska...
" Johnsgard, PA 1968. Waterfowl: their biology and natural history. University of Nebraska Press, Lincoln. "
Systematics and Taxonomy of Australian Birds - Página 233
por Les Christidis, Walter Boles - 2008 - 277 páginas
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Manual of Neotropical Birds, Volumen1

Emmet Reid Blake - 1977 - 674 páginas
...of Birds of the Americas, pt. 1, no. 2. Delacour, J., 1 954-64, Waterfowl of the World, vols. 1-4. Johnsgard, PA, 1968, Waterfowl: Their Biology and Natural History, University of Nebraska Press. KEY TO THE SPECIES 1. Swans, Geese, and Gooselike Ducks 2 Distinguished from ordinary ducks either...
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The Ecology and Management of Breeding Waterfowl

Bruce D. Batt
...Auk 78:1-43. Johnsgard, PA 1965. Handbook of waterfowl behavior. Cornell University Press, Ithaca, NY Johnsgard, PA 1968. Waterfowl: their biology and natural...University of Nebraska Press, Lincoln. Johnsgard, PA 1975. Waterfowl of North America. Indiana University Press, Bloomington. Johnsgard, PA 1978. Ducks,...
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Ducks, Geese and Swans: Species accounts (Cairina to Mergus)

Janet Kear - 2005 - 908 páginas
...1961b. Breeding biology of the Magpie Goose. Wildfowl 12: 92-103. Johnsgard, PA 1961c. The trachéal anatomy of the Anatidae and its taxonomic significance. Wildfowl 12: 58-69. Johnsgard, PA 196 Id. The sexual behavior and systematic position of the Hooded Merganser. Wilson Ball. 73: 226-36....
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