Bi-annual report  : 1991-1992 
/ ed. by the International Soil Reference and Information centre 
. - Wageningen  : ISRIC, 1992
. - 105 p.  : ill.  ; 25 cm. 
<br/><br/><label>ISBN: </label>9066720549 
<br/><br/><label>Source: </label> Fonds FACAGRO 
<br/><br/><label>Universal Decimal Class. No.: </label>631.4