Walkar, John Charles . <br/><br/>
Plant Pathology /  Textual Documents 
John Charles Walkar. 
 - 1st / 
 - New York :  McGraw - Hill book company ,  1957. 
 - xi,707p. ;  24 cm.. 
<br/><br/><label>ISBN: </label> HB 
<br/><br/><label>Subjects--Index Terms: </label>T/G-Botany 
<br/><br/><label>Dewey Class. No.: </label>581.2  / W 152 P