Tilden, James W. <br/><br/>
A field guide to western butterflies 
/ James W. Tilden & Arthur Clayon Smith 
 - Boston, Massachusetts  : Houghton Mifflin Company  , c1986. 
 - 370p. pb. il. photos us  15 
 - Peterson Field Guides .
<br/><br/><label>ISBN: </label>0-395-41654-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Butterflies
<br/><br/><label>Dewey Class. No.: </label>595.78 TIL