350 



POPULATION ECOLOGY: 



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and L. C. Birch, 1954. The Distribution and Abundance 



of Animals. The University of Chicago Press, Chicago. 



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Elton, C. S., 1958. The Ecology of Invasions by .inimals and 



Plants. Methuen & Co., London. 

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and VVilkins Co., Baltimore. 

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Klopfer, P. H., 1962. Behavioral .Aspects of Ecology. Concepts 



of Modern Biology Series. Prentice-Hall, Englewood 



Clififs.N.J. 

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Crowell Co., New York. 

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of Peromyscus. Rood Associates Publ., .Santa Barbara, 



Calif. 

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& Sons, New York. 



. 1953. The Herring (lull's World. Collins, London. 



Welles, R. E., and F. B. Welles, 1961. The Bighorn of Death 



I'alley. U. S. Govt. Printing Office, Washington, D. C. 



