TY  - BOOK
AU  - Graaff,Jan de
TI  - Soil coservation and sustainable land use
SN  - 9068320424
AV  - HD1131 .G73 1993
U1  - 338.39 
PY  - 1993///
CY  - Manila
PB  - Royal Tropical Institute
KW  - Economic development
KW  - Developing countries
KW  - Soil conservation
ER  -