Peterson, Roger Tory,  1908- <br/><br/>
A field guide to Western birds / 
by Roger Tory Peterson 
 - Boston :  Mifflin,  1969 
 - xxvi, 366 p. :  ill. (some col.) ;  20 cm. 
<br/><br/> Includes index 
<br/><br/><label>LCCN: </label>60-012250 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds--West (U.S.)