TY  - GEN
AU  - Khan, S V
AU  - Schnitzer, M
TI  - Soil organic matter
T2  - Developmets in soil science 8
SN  - 0444408827
U1  - 631.417 SCH 
CY  - U S A, Elsevier Publishing Company
KW  - Soil organic matter / Humic substances
ER  -