TY  - BOOK
AU  - Food and Agricultur Organization 
TI  - Soil : conserving the soil impraving the soil
T2  - Better farming series; no.10
U1  - 581.5 
PY  - 1970///
CY  - Rome
PB  - Food and Agricultural Organization of the United Nations
N1  - reprinted 1972
ER  -