Green manuring :  principles and practice of natural soil improvement / 
Editor William F. Brinton, contributions from Otto Schmid & Reudi Klay. 
 - 3rd rev. ed. 
 - Mt. Vernon, Me. :  Woods End Agricultural Institute,  1989. 
 - v, 51 p. 
<br/><br/><label>ISBN: </label>0960355456 
<br/><br/><label>LCCN: </label>93016279      
<br/><br/><label>Subjects--Topical Terms: </label><br/>Green manuring.