TY  - BOOK
ED  - Soil Consevation Society of America, Ankeny (USA)
ED  - National Conference on Soil Conservation Policies
TI  - Soil conservation policies: an assessment: Based on material presented at the National Conference on Soil Consevation Policies, Washington. 15-16 November , 1979
PY  - 1979///.
CY  - Ankeny USA): 
PB  - SCSA, 
KW  - Conservação do solo
KW  - Politica agricola
N1  - Includes bibliographies
ER  -