TY  - BOOK
AU  - Schnitzer .M . and Khan ,S .V. 
TI  - Humic Substances in the Environment 
SN  - 08247110140
PY  - 1972///
CY  - New York 
PB  - Mercel Dekker
KW  - Humus
KW  - Soil Chemistry
KW  - Chemistry, Organic
ER  -