Widdowson, R.W. <br/><br/>
Towards holictic agriculture :  a scientific approach / 
R.W. Wi ddowson. 
 - Oxford :  Pergamon Press,  1987. 
 - xi, 187 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0080342116 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Organic farming.<br/>Agricultural ecology.<br/>Agriculture.
<br/><br/><label>Dewey Class. No.: </label>631.584 WID