Life Histories of North American Birds, with Special Reference to their Breeding Habits and Eggs

BENDIRE, Charles.

Birds of Cyprus

BANNERMAN, David A. and W. Mary.

The History of American Ornithology Before Audubon

Allen, Elsa Guerdrum.

The Birds of Sikkim

ALI, Salim.

The Birds of Newfoundland Labrador

Austin, Oliver L., Jr.

British Birds' Eggs & Nests

Atkinson, Rev. Canon

Catalogue of the Birds of the Americas and Adjacent Islands, Part I, Number 4. Cathartidae - Accipit

Hellmayr, Charles E; Conover, Boardman; Cory, Charles B.