-
Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.
amwpel.01 Blood,
Donald A.; Hames, Michael; Graham, Arifin; Pawlas,
Richard & Friis...
-
Birds of the World. Ithaca, NY:
Cornell Lab of Ornithology. doi:10.2173/bow.
amwpel.01. S2CIDÂ 216485857. Schreiber, R. W.; Risebrough, R. W. (1972). "Studies...