Mechanics of feeding of the mallard (Anas platyrhynchos L., Aves, Anseriformes) : the lingual apparatus and the suction-pressure pump mechanism of strining - Zweers, G. A.; Gerritsen, A. F. C. (Anton F.C.).; Kranenburg-Voogd, P. J. van (Paula J.van). (Basel : S. Karger, 1977)
Bibliography : p.(104)-107.
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Keywords: Mallard; Birds -- Feeding and feeds; Birds -- Anatomy; Ducks