Cultivating knowledge  : genetic diversity, farmer experimentation and crop research 
/ Walter de Boef, Kojo Amanor, Kate Wellard, Anthony Bebbington 
. - London  : Intermediate Technology publ., 1993
. - XVI-206 p.  : couv. ill. en coul.  ; 23 cm. 
<br/><br/>Bibliogr. Index 
<br/><br/><label>ISBN: </label>9781853392047 1853392049 
<br/><br/><label>Universal Decimal Class. No.: </label>630.