Walker John Charles <br/><br/>
Plant pathology 

 -  1950 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>53185 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plant diseases<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:4, J03