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Black duck band recovery data for 1968 and winter population estimates for 1967 and 1968 / U.S. Bureau of Sport Fisheries and Wildlife.

By: Material type: TextTextSeries: Administrative report (U.S. Fish and Wildlife Service)Publication details: Laurel, MD : U.S. Bureau of Sport Fisheries and Wildlife, 1969, 1970.Description: v. ; 28 cm

Title varies, no. 190: Black duck recovery data for 1968 and 1969 preseason and winter bandings.

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