1970 



Anderson, B. W. 1970. Psuedo-sleeplng attitude in Lesser Scaup and Ring- 

 necked ducks. Condor 72: 370-371. 



1969 



Anderson, B. W. and D. W. Warner. 1969. A morphological analysis of a large 

 sample of Lesser Scaup and Ring-necked Ducks. Bird-Banding 40: 85-94. 



Anderson, B. W., T. P. Ketola and D. W. Warner. 1969. Spring sex and age 

 ratios of Lesser Scaup and Ring-necked ducks in Minnesota. J. Wildl. 

 Manage. 33: 209-212. 



Laperle, M. 1969. Breeding records of the Ring-necked Duck in Gaspe South 

 County, Quebec. Can. Field-Nat. 83: 280-281. 



1966 



Reed, A. 1966. Breeding records of the Ring-necked Duck ( Aythya collaris) in 

 Riviere-du-Loup and Rimouski counties, Quebec. Can. Field-Nat. 80: 182. 



1965 



Marshall, D. B. and H. F. Duebbert. 1965. Nesting of the Ring-necked Duck in 

 Oregon in 1963 and 1964. Murrelet 46: 43. 



1963 



Ripley, S. D. 1963. Courtship in the Ring-necked Duck. Wilson Bull. 75: 

 373-375. 



1961 



Ennis, T. 1961. Ring-necked Duck in Co. Armagh. Brit. Birds 54: 72-73. 



1958 



Mendall, H. L. 1958. The Ring-necked Duck in the northeast. Univ. Maine 

 Stud. No. 73. 317 pp. 



1957 



Goodwin, A. B. 1957. A study of Ring-necked Duck nesting in the pothole region 

 of Mahnomen County, Minn. Flicker 29: 22-29. 



1955 



Cooch, G. 1955. Ring-necked Duck ( Aythya collaris ) breeding in Saguenay 

 County, Quebec. Can. Field-Nat. 69: 130. 



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