TY  - BOOK
AU  - Norman,David, Douglas, Malcolm
AU  - x
TI  - Farming systems development and soil conservation: x
SN  - 8170355125 
U1  - 631.45/N843f 
PY  - 1994///
CY  - Delhi
PB  - Daya Pub.
KW  - Soil conservation
KW  - Soil ecology
ER  -