+---------------------------------------------------------+ | UNITED STATES | | DEPARTMENT OF AGRICULTURE | | | | CIRCULAR No. 363 | | | +---------------------------------------------------------+ | 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 | | | | | | [Illustration] | | | | | +---------------------------------------------------------+ CIRCULAR No. 363 OCTOBER 1935 UNITED STATES DEPARTMENT OF AGRICULTUR…
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