OELHAF,Robert C <br/><br/>
Organic Agriculture: Economic and Ecological Comparisons with Conventional m 

 - Montclair.  Allaheld,Osmun  1978 
 - (xii), 271 
<br/><br/><label>ISBN: </label>470264276 
<br/><br/><label>Dewey Class. No.: </label>631.584