Text ( visual ) : unmediated A field guide to hawks, North America / William S. Clark ; illustrations by Brian K. Wheeler. -- : pbk. -- Boston : Houghton Mifflin , c1987. -- xi, 198 p. : ill., maps ; 19 cm. -- (The Peterson field guide series ; 35). -- "Sponsored by the National Audubon Society and the National Wildlife Federation." ; Bibliography: p. 163-186 ; Includes indexes. -- ISBN 0395360013 ; 0395936152 ; (BA46826228) ; https://ci.nii.ac.jp/ncid/BA46826228 Other Title(s): Hawks of North America. -- Author Heading(s): Clark, William S. ; Wheeler, Brian K. ; National Audubon Society ; National Wildlife Federation. -- Classification(s): LCC : QL696.F3 ; DC19 : 598/.916. -- Subject Heading(s): LCSH : Birds of prey -- North America -- Identification ; LCSH : Birds -- Identification ; LCSH : Birds -- North America -- Identification