Proceedings of the  :  fourth international soil classification workshop[held in]Rwanda on 2 to12 June 1981:part 2: Field trip and bacground soil data 
/ ed. by F.H.Beinroth, H.Neel, H.eswaran 
. - Bruxelees  : ABOS : AGCD, 1983
. - VI-175 p.  : ill.,cou.ill. en coul.  ; 29 cm. 
 - Agricultural editions   4 .
<br/><br/><label>Source: </label> don 
<br/><br/><label>Universal Decimal Class. No.: </label>631.44