Bos, L. <br/><br/>
Symptoms of virus diseases in plants :  with indexes of names of symptoms in English, Dutch, German, French, Italian, and Spanish / 
L. Bos 
 - 3rd ed 
 - Wageningen :  Center for Agricultural Publishing and Documentation,  1978 
 - 225 p. :  ill. ;  20 cm. 
<br/><br/>Includes bibliographies and indexes 
<br/><br/><label>ISBN: </label>9022006581