MIGRATION OF BIRDS
By Frederick C. LincolnRevised By Steven R. PetersonAssociate Editor Peter A. AnastasiIllustrated By Bob Hines
By Frederick C. Lincoln
Revised By Steven R. Peterson
Associate Editor Peter A. Anastasi
Illustrated By Bob Hines
Geese FlyingCircular 16.Revised Edition - 1979FISH & WILDLIFE SERVICE / UNITED STATES DEPARTMENT OF THE INTERIOR
FISH & WILDLIFE SERVICE / UNITED STATES DEPARTMENT OF THE INTERIOR