TY  - RPRT
TI  - The uniqueness of humic substances in each of soil, stream and marine environments
AU  - Ronald L. Malcolm
PY  - 1990
DO  - 10.1016/s0003-2670(00)81222-2
UR  - https://pubs.usgs.gov/publication/70016128
ID  - 70016128
ER  -