! 96i ) 



Hartman, F. E. 1960. Ecology of Black Ducks wintering in the Penobscot Estu- 

 ary. M.S. thesis, Univ. Maine/Orono, ME. 142 pp. 



Johnsgard, P. A. 1960. A quantitative study of sexual behavior of Mallards 

 and Black Ducks. Wilson Bull. 72: 133-155. 



Stotts, V. D. and D. E. Davis. 1960. The Black Duck in the Chesapeake Bay of 

 Maryland: breeding behavior and biology. Chesapeake Sci. 1: 127-154. 



Winner, R. W. 1960. Fall and winter movements of Black and Mallard ducks. J. 

 Wildl. Manage. 24: 332-335. 



1959 



Lemieux, L. and G. Moisan. 1959. The migration, mortality rate and recovery 

 rate of the Quebec Black Duck. Trans. N.E. Wildl. Conf. 1: 124-148. 



Stotts, V. D. 1959. Black Duck studies: final report. Md. Pittman-Robertson 

 Project W-30-R-7. 241 pp (typewritten). 



Winner, R. W. 1959. Field-feeding periodicity of Black and Mallard ducks. J. 

 Wildl. Manage. 23: 197-202. 



1958 



Murray, L. H. 1958. The Black Duck in Saskatchewan. Blue Jay 16: 109-111. 



Stewart, R. E. 1958. Distribution of the Black Duck. U.S. Fish & Wildl. Serv. 

 Circ. No. 51. ii and 8 pp. 



Stotts, V. D. 1958a. The time of formation of pairs in Black Ducks. Md. Con- 

 serv. 35: 11-15. 



. 1958b. The time of formation of pairs in Black Ducks. Trans. N. Am. 



Wildl. Conf. 23: 192-197. 



1957 



Benson, D. 1957. Studies in the ecology of the Black Duck, Anas rubripes Brew- 

 ster. M.S. thesis, Cornell Univ. /Ithaca , NY. 



Stotts, V. D. 1957a. Banding Black Ducks in Maryland. Md. Conserv. 34: 16-20. 



. 1957b. The Black Duck ( Anas rubripes ) in the upper Chesapeake Bay. 



Proc. 10th Annu. Conf. Southeastern Assoc. Game & Fish Commiss. : 234-242. 



Winner, R. W. 1957. A study of local and migratory movements of Black and 



Mallard duck populations in central Ohio. Ph.D. thesis, Ohio St. Univ./ 

 Columbus , OH. 



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