Ahlgren G H <br/><br/>
Principles of weed control 

 - New York       John Wiley         1951 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>54337 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Plant development<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J:57, J1