Biological control in crop production. 

 - Totowa, New Jersey :  Allanheld, Osmun,  1981. 
 - 461 p. :  ill. 
 - Beltsville symposia in agricultural research. .
<br/><br/> "Invited papers presented at a symposium held May  18-21, 1980, at the Beltsville Agricultural Research Center (BARC), Beltsville, Maryland" 
<br/><br/><label>ISBN: </label>0865980373 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Protection of.<br/>Pests--Control--Biological control.