Environmentally sound agriculture :  selected papers from the Fourth International Conference of the International Federation of Organic Agriculture Movements, Cambridge, Massachusetts, August 18 to 20, 1982 / 

 - xii, 426 pages :  illustrations ;  25 cm 
<br/><br/><label>ISBN: </label>0030628636 9780030628634 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural conservation<br/>Agricultural ecology<br/>Agriculture<br/>Organic farming
<br/><br/><label>Dewey Class. No.: </label>630 IIR 1999 C111 Or.