Pettingill, Olin Sewall . <br/><br/>
Ornithology in Laboratory and Field /  Textual Documents 
Olin Sewall Pettingill. 
 - 4th ed. / 
 - Delhi :  Surjeet Publications ,  1985. 
 - xvii,624p. :  ill ;  24cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Zoology Birds G-Zoology 
<br/><br/><label>Dewey Class. No.: </label>598.2  / P 454 Or