No-tillage agriculture :   principles and practices 
edited by Ronald E. Phillips, Shirley H. Phillips. 
 - New York :  Van Nostrand Reinhold,  1984. 
 - 306p  24cm 
<br/><br/><label>ISBN: </label>0442277318 
<br/><br/><label>Dewey Class. No.: </label>631.5'8 PHI