UNITED STATES / 
DEPARTMENT OF AGRICUD 
CIRCULAR No. 363 i 
Washington, D. C. October 1935 
THE MIGRATION 
OF NORTH AMERICAN BIRDS 
By 
FREDERICK C. LINCOLN 
Senior Biologist in Charge, Section of Distribution and Migration of Birds 
Division of Wildlife Research, Bureau of Biological Survey 
For sale by the Superintendeat of Documents, Washington, D.C. - - - - - - = Price 10 cents 
