Author: Osgood, W.H., 1900.:
Title: Revision of the pocket mice of the genus Perogntahus. {North Amer. Fauna, 18.]
Description: Washington: Government Printing Office, 1900. 8vo. Pp. 72, 17 figs. of skulls on 2 plates,, 1 map, 15 figs. in text. Orig. printed wrappers. Very good.

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