Mechanics of feeding of the mallard : the lingual apparatus and the suction-pressure pump mechanism of straining

By Zweers, G. A. . Basel ; London : [Chichester] : Karger ; [Distributed by Wiley], Karger , 1977 . vii,109p. : ill. 3805524242 (pbk)

Blueberries

By Zweers, G. A.,Gerritsen, A. F. C,Kranenburg-Voogd, P. J. van.. NY : Novika, 2016 . xi, 117 pages : , "Novinka." 23 cm.. 9781634848855 | 1634848853