United States. Department of Agriculture. Agricultural Research Service   <br/><br/>
Index of plant virus diseases  (Book) 

 - Washington, D.C.  Department of Agriculture  1966 
 - 446 p.  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Virus diseases of plants
<br/><br/><label>Universal Decimal Class. No.: </label>632.38 (083.86) UNI  / 5683