Widdowson R W <br/><br/>
Towards holistic agriculture  : a scienctific approach 
R W Widdowson 
 - Oxford:  Pergamon,  1987. 
 - 187p 
<br/><br/> Includes index and bibliography 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology
<br/><br/><label>Dewey Class. No.: </label>630  / WIT