Widdowson, R. W., <br/><br/>
Towards holistic agriculture :  A scientific approach / 
By r.w. widdonwson ; with a foreword by eve balfour 
 - 187 páginas 
<br/><br/><label>ISBN: </label>0080342116 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura biológica<br/>Agricultura<br/>Ecología agrícola
<br/><br/><label>LC Class. No.: </label>S605.5  / W53