AU  - Thomposon,Louis M.
AU  - Troeh,Frederick R.
TI  - Soils and soil fertility 
U1  - 631.4 
PY  - 1975///
CY  - New Delhi : 
PB  - TATA Mcgraw-Hill Publishing Co, Ltd., 
KW  - Soil Conservation
KW  - Soils and Soil Fertility
ER  -