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aelred d geis
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Breeding and wintering areas of mallards harvested in various States and Provinces
Aelred D. Geis · U.S. Bureau of Sport Fisheries and Wildlife; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
59 sayfa · 1971
Duck shooting / Mallard / Waterfowl management
Use of banding data in migratory game bird research and management
Aelred D. Geis · U.S. Bureau of Sport Fisheries and Wildlife, for sale by the Supt. of Docs., U.S. Govt. Print. Off.
47 sayfa · 1972
Bird banding / Game bird management