1949. Population interspersion. An essay in animal community patterns. Jour. Ecol., 37:1-23.

Errington, P. R.

1935. Food habits of midwestern foxes. Jour. Mamm., 16:192-200.

1936. What is the meaning of predation? Smithsonian Inst. Rep., 1936:243-252.

1943. An analysis of mink predation upon muskrat in north central United States. Agric. Exp. Sta., Iowa State Coll. Agric. Mech. Arts, Res. Bull., 320:799-924.

1946. Predation and vertebrate populations. Quart. Rev. Biol., 21:144-177.

Errington, P. L., F. Hamerstrom, and F. N. Hamerstrom, Jr.

1940. The great horned owl and its prey in north central United States. Agric. Exp. Sta., Iowa State Coll. Agric. Mech. Arts, Res. Bull., 277:759-831.

Fisher, H. J.