TRAVELS AND TRADITIONS OF WATERFOWL 



-, and L. Tinbergen 



1947. Waarnemingen over de vlieghoogte van trekkende vinken, FringiUa coelebs L., 

 en spreeuwen, Sturnus vulgaris L. Ardea 35:45-78. 

 Delacour, Jean 



1944. Government refuges are saving the Trumpeter Swan. Animal Kingdom 47 (6) : 

 130-136. 



1951. Preliminary note on the taxonomy of Canada Geese, Branta canadensis. Amer. 



Museum Novitates No. 1537. 

 1954. The waterfowl of the world, Vol. 1. London: Country Life. 

 , and Ernst Mayr 



1945. The Family Anatidae. Wilson Bull. 57 (1) : 3-55. 

 Dice, Lee R. 



1940. Ecologic and genetic variability within species of Peromyscus. Amer. Natu- 

 ralist 74 (752): 2 12-221. 

 Dobben, W. H. van 



1953. Bird migration in the Netherlands. Ibis 95 (2) :212-234. 

 Dobzhansky, T. 



1937. Genetics and the origin of species. New York: Columbia Univ. Press. 

 Dorer, Richard 



1954. Save Minnesota's wetlands. Minnesota Naturalist, Sept., pp. 1-5. 

 Drost, Rudolf 



1949. Zugvogel perzipieren Ultrakurzwellen. Vogelwarte 2:57-59. 



1951. Study of bird migration 1938-1950. Proc. 10th International Ornithological 

 Congress (Uppsala, 1950), pp. 216-240. 



Durant, Will 



1952. The story of philosophy. New York: Pocket Books. 

 Duvall, Allen J. 



1949. Migration of the Ring-necked Duck. Pp. 29-31 of John W. Aldrich and 

 others," Migration of some North American waterfowl, U.S. Fish and Wildlife 

 Service, Special Scientific Report (Wildlife) No. 1, pp. 1-49. 



Dzubin, Alex 



1954. An intensive study of waterfowl populations on agricultural land. Unpublished 

 thesis, Univ. of British Columbia. 



1955. Some evidences of home range in waterfowl. Trans. 20th North Amer. Wildlife 

 Conference, pp. 278-297. 



Ebbinghaus, Hermann 



1913. Memory, a contribution to experimental psychology. New York: Columbia 

 Univ. Press. 

 Eddington, A. S. 



1930. The nature of the physical world. New York: Macmillan. 

 Einstein, Albert 



1950. The meaning of relativity (3rd rev. ed.). Princeton, N.J.: Princeton Univ. Press. 

 Elder, William H. 



1946. Age and sex criteria and weights of Canada Geese. J. Wildlife Management 10 

 (2):93-lll. 



, and Nina L. Elder 



1949. Role of the family in the formation of goose flocks. Wilson Bull. 61 (3) : 133-140. 



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