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(genera Tamias and Eutamias)
出版U.S. Government Printing Office, 1924
URLhttp://books.google.com.hk/books?id=jCZ0kGczHZUC&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN
註釋Discusses distribution, habitat, habits, pelage, molt, specimens, history, and nomenclature of pikas. Provides descriptions, locations, and a key for species and subspecies.