TY  - RPRT
TI  - The mass balance approach: application to interpreting the chemical evolution of hydrologic systems
AU  - Niel Plummer
AU  - W. Back
PY  - 1980
DO  - 10.2475/ajs.280.2.130
UR  - https://pubs.usgs.gov/publication/70012188
ID  - 70012188
ER  -