Walkey, D.G.A. <br/><br/>
Applied plant virology / 
D.G.A. Walkey 
 - 2nd ed. 
 - London :  Chapman and Hall,  1991 
 - viii, 332 p. :  .ill. ;  24 cm. 
<br/><br/>Includes bibliographies and indexes 
<br/><br/><label>ISBN: </label>0412357402  RM 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops. Virus diseases