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the winter season: December 1, 1970-March 

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the winter season: December 1, 1971-March 

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the winter season: December 1, 1973-March 

 Birds 28: 628-632. 



the winter season: December 1, 1974-March 

 Birds 29: 679-683. 



the winter season: December 1, 1975-March 

 Birds 30: 708-711. 



the winter season: December 1, 1976-Feb- 

 Am. Birds 31: 322-325. 



the winter season: December 1, 1977-Feb- 

 Ara. Birds 32: 339-342. 



the winter season: December 1, 1978-Feb- 

 ruary 28, 1979; Florida Region. Am. Birds 33: 274-276. 



Stewart, R. E. 1962. Waterfowl populations in the upper Chesapeake region. 

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Stieglitz, W. 0. 1967. Utilization of available foods by diving ducks on 



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1971. The changing seasons 

 "31, 1971; Florida Region. Am. 



1972. The changing seasons 

 "31, 1972; Florida Region. Am. 



1974. The changing seasons 

 "31, 1974; Florida Region. Am. 



1975. The changing seasons 

 31, 1975; Florida Region. Am. 



1976. The changing seasons 

 31, 1976; Florida Region. Am. 



1977. The changing seasons 

 ruary 28, 1977; Florida Region 



1978. The changing seasons 

 "ruary 28, 1978; Florida Region 



1979. The changing seasons 



487 



