Nicol, Hugh <br/><br/>
Biological control of insects / 
Hugh Nicol 
 - New York :  Penguin Books,  1943 
 - 174 p. :  ill., maps ;  18 cm. 
 - Pelican Books .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural pests--Biological control<br/>Insect pests--Biological control<br/>Biological pest control agents<br/>Insects, Injurous and benificial--Biological control
<br/><br/><label>Dewey Class. No.: </label>632.96