Open door to plenty /  
National Agricultural Chemical Association. 
 - Washington D. C. :    National Agricultural Chemical Association,    1960. 
 - 64 p. :    ill. ;    23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Pest control.<br/> Agricultural chemicals -- United States.
<br/><br/><label>Dewey Class. No.: </label>Pam 632.9 OPE