Books by Alan Contreras
A pocket guide to Oregon birds
A pocket guide to Oregon birds (Special publication / Oregon Field Ornithologists)
Birds of Coos County, Oregon
Northwest birds in winter
A Pocket guide to Oregon birds
A Pocket guide to Oregon birds
Birds of Malheur County, Orego
Birds of Malheur County, Oregon and the adjacent Snake River islands of Idaho (Oregon Field Ornithologists / Special publication)