The Breeding Bird Survey 1967 and 1968
Robbins, Chandler S.; Willet T. Van Velzen
A Field Guide to the Nests, Eggs and Nestlings of North American Birds
The Ducks, Geese and Swans of North America: a Vade Mecum for the Naturalist and the Sportsman
Kortright, Francis H.
Illustrations by T.M. Shortt
ABA Field Checklist - Weatherproof field card
American Birding Association
Life Histories of North American Thrushes, Kinglets, and Their Allies
Bent, Arthur Cleveland and Collaborators
Systematics and Behavior of Some North American Woodpeckers, Genus Picoides (Aves)
Short, Lester L.
National Geographic Field Guide to the Birds of North America, Seventh Edition
DUNN, Jon L. and Jonathan ALDERFER
Bird Lore I-XXXII
The Audubon Society Master Guide to Birding, Volume 3: Old World Warblers to Sparrows
Farrand, John, Jr. (editor)
Birds of Organ Pipe Cactus National Monument
Wilt, Richard A.
North American Birds: A Coloring Book