A History of North American Birds; Land Birds; Vol. 1 of 3 - Spencer Fullerton Baird; T. M. Brewer; Robert Ridgway - Page №542

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1. Loxia americana. ♂ W. Ter., 6442.

2. Loxia leucoptera. ♂ Philad., 1215.

3. Loxia leucoptera. ♀ Alaska (Yukon), 27360.