TY  - BOOK
AU  - Lal,Ratan---(etal), x
AU  - x
TI  - Soil degradation in the united states: extent, serverity, and trends
SN  - 1566705347
U1  - 333.70973/S683 
PY  - 2004///
CY  - London
PB  - Lewis pub.
KW  - Soil degradation-United states
KW  - Soil Science
N1  - x
ER  -