Biological control in crop production / 
George C. Papavizas, (editor) 
 - Osmun, Montclair, N.J. :  Allanheld,  1981 
 - 461p. :  ill. ;  24 cm. 
 - Beltsville symposia in agricultural research  5 .
<br/><br/> Papers presented at an annual symposium organized by BARC Symposium V Committee; sponsored by and held at Beltsville Agricultural Research Center, Md., May 18-21, 1980 
<br/><br/>Includes bibliographical references and indexes 
<br/><br/><label>ISBN: </label>0865980373 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pests--Biological control--Congresses<br/>Plants, Protection of--Congresses