STATE OF ILLINOIS 



William G. Sfratton, Governor 



DEPARTMENT OF REGISTRATION AND EDUCATION 

 Vera M. Binks, Director 



«-:k. <^" 



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A SPECTACULAR WATERFOWL MIGRATION 

 THROUGH CENTRAL NORTH AMERICA 



Frank C. Bellrose 



^ 



^ 



v^^ 



Biological Notes No. 36 



Printed by Authority of the State of Illinois 



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NATURAL HISTORY 

 SURVEY DIVISION 



Harlow B. Mills, Chief 

 Urbana, Illinois 



MAY 7 1957 



April, 1957 



iMIUKAL 



HlSlony SURVEY 



LI^'RARY 



