[en] [Gutenberg 49335] • Conservation of marine birds of northern North America: / papers from the international symposium held at the Seattle Hyatt House Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service
[en] [Gutenberg 55173] • Golden Dicky, The Story of a Canary and His Friends New York F.A. Stokes Co
[en] [Gutenberg 62675] • Some Common Birds in Their Relation to Agriculture Forgotten Books
[en] [Gutenberg 62678] • Some Common Birds Useful to the Farmer (1926 edition) Forgotten Books
[en] [Gutenberg 62696] • Some Common Birds Useful to the Farmer (1915 edition) Forgotten Books
[en] [Gutenberg 59880] • Bird Biographies Palala Press
[en] [Gutenberg 39975] • Audubon and his Journals, Volume 1 (of 2) Andesite Press
[en] [Gutenberg 39979] • Audubon and his Journals, Volume 2 (of 2) Arkose Press
[en] [Gutenberg 34135] • A Book-Lover's Holidays in the Open Nabu Press
[en] [Gutenberg 45630] • Bird Guide: Land Birds East of the Rockies, from Parrots to Bluebirds Doubleday, Doran and Co.