Broadbent, L. <br/><br/>
Investigation of viruses disease of brassica crops 

 - Cambridge  Cambridge University Press  1957 
 - vii,94p.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Viruses of plants
<br/><br/><label>LC Class. No.: </label>SB736.B7