Ralph Hoffmann

Birds of the Pacific States
Bird Portraits
Flora of Berkshire County, Massachusetts
The Birds of Berkshire County, Massachusetts
A Guide to the Birds of England and Eastern ; Containing a key for Each Season and Short Descriptions of Over 250 Species, With Particular Reference to Their Appearance in the Field
Bird World
A Guide to the Birds of England and Eastern ; Containing a key for Each Season and Short Descriptions of Over two Hundred and Fifty Species, With Particular Reference to Their Appearance in the Field

Ralph Hoffmann

Other

Bird World