TY  - BOOK
AU  - Humberto Blanco
AU  - Rattan Lal
TI  - Principles of Soil Conservation and Management
SN  - 9781402087080
U1  - 631.4  B 598 S 
PY  - 2008///
PB  - Spinger (New york)
KW  - Soil Science
ER  -