HELLEBREKERS WPJ (1963) Oölogy and Nidology communications, 1961-II and 1962: Blue Cuckoo Eggs Cuculus canorus eggs and Linnet Carduelis cannabina as worthy bird. LIMOSA 36 (1): 110-110.

Blue Cuckoo Cuculus canorus eggs and Linnet Carduelis cannabina as worthy bird Common Cuckoo Cuculus canorus Common Linnet Carduelis cannabina

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