1951. A new record of Zapus hudsonius in Missouri and notes on its hibernation. Jour. Mamm., 32:227-228, May 21, 1951.

Sheldon, C.

1934. Studies of the life histories of Zapus and Napaeozapus in Nova Scotia. Jour. Mamm., 15:290-300, November 15, 1934.

1938. Vermont jumping mice of the genus Zapus. Jour. Mamm., 19:324-332, 4 figs. in text, August 18, 1938.

Simpson, G. G.

1947. Holarctic mammalian faunas and continental relationships during the Cenozoic. Bull. Geol. Soc. America, 58:613-688, 6 figs. in text, 9 tables, July, 1947.

Smith, C. F., and Hopkins, C. L.

1937. Notes on the barn owls of the San Francisco Bay Region. Condor, 39:189-191, September 15, 1937.

Stanford, J. S.