A field guide to eastern butterflies - Opler, Paul A.; Malikul, Vichai; National Audubon Society; National Wildlife Foundation; Roger Tory Peterson Institute (Boston : Houghton Mifflin, 1992)
Spine title: Eastern butterflies
'Sponsored by the National Audubon Society, the National Wildlife Foundation, and the Roger Tory Peterson Institute.'
Includes bibliographical references (p. 359-362) and index
Keywords: Butterflies -- East (U.S.); Butterflies -- Canada, Eastern; Butterflies -- Greenland