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A Biological Survey of Colorado
From introduction: "Report based chiefly on the field work prosecuted during 1905, 1906, 1907, and 1909. It is primarily a characterization of the several major distribution areas or life zones."
Date:
August 17, 1911
Creator:
Cary, Merritt
System:
The UNT Digital Library
Revision of the American Pikas (Genus Ochotona)
Discusses distribution, habitat, habits, pelage, molt, specimens, history, and nomenclature of pikas. Provides descriptions, locations, and a key for species and subspecies.
Date:
August 21, 1924
Creator:
Howell, Arthur H.
System:
The UNT Digital Library
The Rabbits of North America
From introduction: "Revision to include all known hares and rabbits of North America from Isthmus of Panama to north Greenland."
Date:
August 31, 1909
Creator:
Nelson, E. W.
System:
The UNT Digital Library