Variation in Falco dickinsoni P. L. Sclater, 1864
Clancey, P. A. (Phillip Alexander), 1917-2001
Article
1968
Bulletin of the British Ornithologists' Club
88
120--123
BioStor
London, British Ornithologists' Club, 1893-
BioStor: https://biostor.org/reference/112831
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