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1by Blandin, Warren Wayne, 1936-1982Subjects: “...Black duck Mortality....”
Published 1992
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2Published 1989Subjects: “...Duck shooting United States Statistics....”
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9by Johnson, F. A. (Frederick Ashby), 1903-Subjects: “...Ducks Counting United States....”
Published 1990
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11Published 1993Subjects: “...Ducks Productivity Prairie Pothole Region....”
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