Part 13

1955. List of North American Recent mammals. Bull. U.S. Nat. Mus., 205: xii + 1-954.

OVER, W. H., and E. P. CHURCHILL

1945. Mammals of South Dakota. Univ. South Dakota Mus., 56 pp. (mimeographed).

PFEIFER, W. K., and E. A. HIBBARD

1970. A recent record of the swift fox (Vulpes velox) in North Dakota. Jour. Mamm., 51:835.

SWENK, M. H.

1941. A study of subspecific variation in the Richardson pocket gopher (Thomomys talpoides) in Nebraska, with description of two new subspecies. Missouri Valley Fauna, 4:1-8.

VISHER, S. S.

1914. Report on the biology of Harding County, northwestern South Dakota. Bull. South Dakota Geol. Surv., 6:1-103.

YOUNG, S. P.

1944. Their history, life habits, economic status, and control. Pp. 1-385, in The wolves of North America (S. P. Young and E. A. Goldman), Amer. Wildlife Inst., Washington, D.C., xx + 636 pp.