Nitrogen and phosphorus :  food production, waste, and the environment : a report of an interdisciplinary research project / 
Keith S. Porter, editor ; Robert J. Young, director. 
 - Ann Arbor, MI :  Ann Arbor Science Publishers,  c1975. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0250401118 
<br/><br/><label>LCCN: </label>75022896 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural wastes.
<br/><br/><label>LC Class. No.: </label>TD930  / .N57 
<br/><br/><label>Dewey Class. No.: </label>363.6