The Online Books Page hasn't yet cataloged the following titles:
|The Bird Book: Illustrating in natural colors more than seven hundred North American birds; also several hundred photographs of their nests and eggs.|
|Bird Guide: Land Birds East of the Rockies, from Parrots to Bluebirds|
|Bird Guide: Water Birds, Game Birds, and Birds of Prey East of the Rockies|
|Color Key to North American Birds: with bibliographical appendix|
|Flower Guide: Wild Flowers East of the Rockies: (Revised and with New Illustrations)|
|Western Bird Guide: Birds of the Rockies and West to the Pacific|
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