Helgeson, Earl A. <br/><br/>
Methods of weed control / 
by Earl A. Helgeson 
 - Rome :  FAO,  1957 
 - x, 189 p. :  plates ;  23 cm. 
 - FAO agricultural studies ;  no. 36 .
<br/><br/><label>ISBN: </label> USD 2.00 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weed control<br/>Weeds--Equipment and supplies
<br/><br/><label>Dewey Class. No.: </label>630.82