Organic plant protection :  a comprehensive reference on.. / 
edited by Roger B. Yepsen. 
 - Emmaus :  Rodale,  1976. 
 - viii, 688 p. ;  24 cm. 
<br/><br/>Includes bib. and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0878571108 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants, Protection of.<br/>Organic gardening.<br/>Garden pests.