TY  - RPRT
TI  - User's guide to PHREEQC (Version 2): A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
AU  - David L. Parkhurst
AU  - C.A.J. Appelo
PY  - 1999
DO  - 10.3133/wri994259
UR  - https://pubs.usgs.gov/publication/wri994259
ID  - wri994259
ER  -