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Comparisons of 1964 and 1965 First-hunting-season Recovery Rates for Mallards, Black Ducks and Pintails
Michael F. Sorensen
出版
U.S. Department of the Interior, Bureau of Sport Fisheries and Wildlife, Division of Wildlife Research, Migratory Bird Populations Station
, 1966
URL
http://books.google.com.hk/books?id=F3n7GgAACAAJ&hl=&source=gbs_api