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Autumn field-feeding patterns of the wild mallard duck (Anas platyrhynchos) / by Garth Ball.

By: Material type: TextTextPublication details: Winnipeg, MB : University of Manitoba, 1983.Description: xii, 100 leaves : ill. ; 29 cmSubject(s): Online resources: Dissertation note: Thesis (M.Sc.)--University of Manitoba, 1983.

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