Environmentally sound agriculture  selected papers from the 4th international conference of the International Federation of Organic Agriculture Movements, Cambridge, Mass., August 18 to 20, 1982 
edited by William Lockeretz 
 - New York  Praeger ;  1983 
 - xii, 426 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural conservation<br/>Agricultural ecology<br/>Agriculture<br/>Organic farming