New species of Leptocera Olivier in the burrows of the pocket gopher, Geomys Bursarius Illinoensis Komarek and Spencer, found in Illinois (Diptera: Sphaeroceridae) [by] O.W. Richards.

v.44:no.19(1964)

Relationships of pocket gophers of the genus Geomys from the Central and Northern Great Plains / by Lawrence R. Heaney and Robert M. Timm.

no.74 (1983)

Descriptions of apparently new species of mammals of the genera Heteromys and Ursus from Washington and Mexico, by D. G. Elliot.

v.3:no.13(1903)