TY  - RPRT
TI  - The study of humic substances--In search of a paradigm
AU  - Robert L. Wershaw
PY  - 2000
DO  - 10.1016/b978-1-85573-807-2.50005-9
UR  - https://pubs.usgs.gov/publication/70198494
ID  - 70198494
ER  -