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

 - Rome  Food and Agriculture Oganization  1957 
 - 189p 
<br/><br/>Earl A. Helgeson & FAO fo the U.N: Methods of weed control.  Rome.  Food and Agriculture Oganization, 1957.--(632.954HEL)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>632.954  / FAO