TY  - RPRT
TI  - Appraisal of the quality of ground water in the Helena Valley, Montana
AU  - K.R. Wilke
AU  - Donald L. Coffin
PY  - 1973
DO  - 10.3133/wri7332
UR  - https://pubs.usgs.gov/publication/wri7332
ID  - wri7332
ER  -