Das, E. N. 1951. “On a New Species of Apororhynchus from the White Scavenger Vulture, Neophron Percnopterus (Linn.) from India”. Records of the Zoological Survey of India 48 (3-4):43-49. https://doi.org/10.26515/rzsi/v48/i3-4/1951/162137.