Walker, John Charles <br/><br/>
Plant pathology 
John Charles Walker 
 - 2nd ed. 
 - New York  McGraw-hill book  1957 
 - 610p.; ill. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>571.92  / W177