TY  - BOOK
ED  - Soil Conservation Society of America. Ankeny, Iowa
TI  - Soil conservation policies an assessment: : based on material presented at the National Conference..
U1  - 631.45 
PY  - 1979///
CY  - Washington
PB  - The society
KW  - Suelos
KW  - Conservación
KW  - Leyes
ER  -