HEG D (1993) Dutch Ornithological Union: Theme Day Life is choosing, including Oystercatchers: Nothing human is alien Oystercatcher: the role of extramarital copulations. LIMOSA 66 (2): 82-83.

Dutch Ornithological Union: Theme Day Life is choosing, including Oystercatchers: Nothing human is alien Oystercatcher: the role of extramarital copulations

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