Cech, Rick <br/><br/>
Butterflies of the east coast : an observers guide 
Rick Cech and Guy Tudor 
 - Princeton  Princeton University Press  2005 
 - xii,345 p. : col. ill. ; 28 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780691090566 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Butterflies -- East (U.S.) -- Identification
<br/><br/><label>Dewey Class. No.: </label>595.789 CEC