806 ^ CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



ment was the development of a technical profession, with training facilities in 

 universities, accelerated research, and publication of scientific literature on 

 game. In a very short time the nature of the profession changed from a quasi- 

 legal and political undertaking to a scientific field comparable to forestry or 

 the agricultural sciences. 



LITERATURE CITED 



California Department of Fish and Game 



1953. Forty-second Biennial Report. 187 pp. Sacramento: Calif. State Printing Office. 



Davis, David E. 



1951. A comparison of reproductive potential of two rat populations. Ecology, 32(3) : 



469-475. 



Day, Albert M. 



1949. North American Waterfowl, xx + 329 pp. New York: Stackpole and Heck, Inc. 



Emlen, J. T., Jr., A. W. Stokes, and C. P. Winsor 



1948. The rate of recovery of decimated populations of brown rats in nature. Ecology, 



29(2):133-145. 



Errington, Paul L. 



1934. Vulnerability of bob-white populations to predation. Ecology, 15(2) :110-127. 



1943. An analysis of mink predation upon muskrats in north-central United States. 



Iowa State Coll. Agri. Res. Bull. 320, pp. 797-924. 



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



1936. The northern bob-white's winter territory. Iowa State Coll. Agri. Res. Bull. 

 201, pp. 301-443. 



Graham, Edward H. 



1944. Natural Principles of Land Use. xiii + 274 pp. New York: Oxford Univ. Press. 

 1947. The Land and Wildlife, xiii + 232 pp. New York: Oxford Univ. Press. 



Grange, Wallace Bykon 



1949. The Way to Game Abundance, with an Explanation of Game Cycles, xviil + 365 



pp. New York: Charles Scribner's Sons. 



HoRNADAY, William T. 



1913. Our Vanishing Wild Life: Its Extermination and Preservation, xvi + 411 pp. 



New York: Charles Scribner's Sons. 



1914. Wildlife Conservation in Theory and Practice, vi + 240 pp. New Haven: Yale 



Univ. Press. 



Leopold, Aldo 



1931. Report on a Game Survey of the North Central States. 299 pp. Madison, Wis.: 



Democrat Printing Co. 

 1933. Game Management, xxi -f 481 pp. New York: Charles Scribner's Sons. 



LoNGHURST, William M., A. Starker Leopold, and Raymond F. Dasmann 



1952. A Survey of California Deer Herds, Their Ranges and Management Problems. 



Calif. Dept. Fish and Game, Game Bull. No. 6. 136 pp. 



Stoddard, Herbert L. 



1931. The Bobwhite Quail: Its Habits, Preservation and Increase, xxix 4- 559 pp. 

 New York: Charles Scribner's Sons. 



