Helgeson,  A. Earl. <br/><br/>
Methods of weed control /  Earl A. Helgeson. 

 - Italy :   FAO,  1957. 
 - x, 189 p. :  ill. ;  23 cm. 
 - FAO agricultural studies  36 .
<br/><br/>336  336 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plant diseases
<br/><br/><label>Dewey Class. No.: </label>632.58 / H367m