UNITED STATES DEPARTMENT OF THE INTERIOR, STEWART L. UDALL, SECRETARY 
Frank P. Briggs, Assistant Secretary for Fish and Wildlife 
Fish and Wildlife Service, Clarence F. Pautzke, Commissioner 
Bureau of Sport Fisheries and Wildlife, Daniel H. Janzen, Director 
WATERFOWL UTILIZATION AND: HUNTING KILL 
1946 THROUGH 1960 
Upper Mississippi River Wildlife and Fish Refuge 
and 
Mark Twain National Wildlife Refuge 
by 
William E. Green 
Wildlife Biologist 

U. S. Fish and Wildlife Service . 
Special Scientific Report--Wildlife No. 71 
Washington, D. C. 
May 1963 
