A field guide to eastern butterflies
By: Paul A. Opler ; illustrated by Vichai Malikul.
Contributors: National Audubon Society.; National Wildlife Federation.; Roger Tory Peterson Institute.
Series: The Peterson field guide series ;; 4
Publisher: Houghton Mifflin
Published: 1992
Place of publication: Boston
Language: eng
Number of pages: 396
Subjects: Butterflies -- East (U.S.); Butterflies -- Canada, Eastern; Butterflies -- Greenland
Other titles: Eastern butterflies.
Notes: Includes bibliographical references (p. 359-362) and index.
Spine title: Eastern butterflies.
"Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute."