TY  - BOOK
AU  - Rattan Lal
AU  - Blum,Winfried EH. 
TI  - Methods for Assessment of Soil Degradation:  Advances in Soil Science / 
SN  - 084937443x
U1  - 333.7313 
PY  - 1997///
CY  - New York
PB  - CRC Press Publisher
KW  - Soil Science
ER  -