Pettingill, Olin Sewall.  <br/><br/>
A laboratory and field manual of ornithology /  
Olin Sewall Pettingill ; illustrated by Walter J. Breckenridge. 
 - 3rd ed. 
 - Minneapolis :   Burgess Pub. Co.,  c 1956. 
 - 379 p.:  ill. ;   29 cm. 
<br/><br/>300   300  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ornithology.
<br/><br/><label>Dewey Class. No.: </label>598.2072 / P764l