United states Department of agriculture, Washington, D C <br/><br/>
Insects  the Yearbook of agriculture1952 

 - Calcutta  Oxford and IBH publishing co.  1969 
 - xviii,780p.; ill 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic entomology<br/>Entomology<br/>Insecticides<br/>Insects