Graaff, Jan de <br/><br/>
Soil coservation and sustainable land use / 
Jan de Graaff 
 - Manila :  Royal Tropical Institute,  c1993. 
 - 191 p. :  22 cm. 
<br/><br/><label>ISBN: </label>9068320424 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economic development<br/>Developing countries<br/>Soil conservation
<br/><br/><label>LC Class. No.: </label>HD1131  / .G73 1993 
<br/><br/><label>Dewey Class. No.: </label>338.39  / G726s