Bull, John L. Birds of North America. : a quick identification guide for all bird-watchers / [electronic resource] / by John Bull and Edith Bull ; illustrated by James Coe.. — 1st Collier Books ed.. : Western region : — New York : : Collier Books,, 1989.. — 144 p. : : ill. (some col.) ; 20 cm. - Macmillan field guides.