UNITED STATES DEPARTMENT OF THE INTERIOR, STEWART L. UDALL, SECRETARY 
Stanley P. Cain, Assistant Secretary for Fish and Wildlife and Parks 
Fish and Wildlife Service, Clarence F. Pautzke, Commissioner 
Bureau of Sport Fisheries and Wildlife, John S. Gottschalk, Director 
PROBLEMS IN AERIAL SURVEYS OF WATERFOWL IN EASTERN CANADA 
t>y 
E. B. Chamberlain and C. F. Kaczynski 
Migratory Bird Populations Station 
Division of Wildlife Research 
Special Scientific Report—Wildlife No. 93 
Washington * November 1965 
