Originally presented as the author's thesis (M.S.), University of Wyoming, 1957.
Issued with Beetle, A. A. Grassland, climax, evolution and Wyoming. Owen, W. B. The mosquitoes of Wyoming. Solheim, W. G. Mycoflora saximontanensis exiccata, Centum VII-VIII. Abstracts of theses and graduate degrees awarded, July 1955-June 1957 (v. 21, no. 2-6 of the series)