On the validity of Alcedo cristata robertsi Peters, 1945
Clancey, P. A. (Phillip Alexander), 1917-2001
Article
1978
Bulletin of the British Ornithologists' Club
98
87--90
BioStor
London, British Ornithologists' Club, 1893-
BioStor: https://biostor.org/reference/112663
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