TY  - BOOK
AU  - Unger,Paul W
ED  - Food and Agriculture Organization of the United Nations(Rome).
TI  - Tillag systems for soil and water sonservation
SN  - 9251021546 (pbk.)
U1  - 631 
PY  - 1984///
CY  - Rome
PB  - FAO
KW  - Soil conservation
KW  - Water conservation
KW  - Soil management
KW  - Conservation tillage
ER  -