TY  - RPRT
TI  - Chemical structure of humic acids - Part 1, a generalized structural model
AU  - R.L. Wershaw
AU  - D.J. Pinckney
AU  - S.E. Booker
PY  - 1977
UR  - https://pubs.usgs.gov/publication/70163071
ID  - 70163071
ER  -