Aldrich, R.J. <br/><br/>
Weed-crop ecology :  principles in weed  management /  [textbook] 
by R. J. Aldrich 
 - Massachusetts :  Breton  publishers,  1984 
 - xiii, 465 pages :  illustrations, 
<br/><br/>includes bibliographical references amdindex 
<br/><br/><label>ISBN: </label>0534028330 
<br/><br/><label>LC Class. No.: </label>SB611  / ALD