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Accomplishments of the Winter Banding Program for Mallards and Black Ducks During 1964 and 1965

R. Kahler Martinson

出版	U.S. Department of the Interior, Bureau of Sport Fisheries and Wildlife, Division of Wildlife Research, Migratory Bird Populations Station, 1965
URL	http://books.google.com.hk/books?id=eiYAtwAACAAJ&hl=&source=gbs_api