Opler, Paul A. <br/><br/>
A field guide to eastern butterflies 
 Eastern butterflies. 
/ Paul A. Opler ; illustrated by Vichai Malikul. 
 - 1a ed. 
 - Boston :  Houghton Mifflin,  1992. 
 - xvii, 396 p. :  il. ;   19 cm. 
 - The Peterson field guide series ;  4 .
<br/><br/> "Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute." 
<br/><br/>Bibliografía (p. 359-362) e indice 
<br/><br/><label>ISBN: </label>039563279X (pbk.) 0395364523 (cloth) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Butterflies--East (U.S.)<br/>Mariposas--Este (U.S.A.)--Canadá<br/>Butterflies--Greenland.
<br/><br/><label>LC Class. No.: </label>QL551.E16  / O65 1992