TY  - RPRT
TI  - Use of isotopes to identify sources of ground water, estimate ground-water-flow rates, and assess aquifer vulnerability in the Calumet region of northwestern Indiana and northeastern Illinois
AU  - Robert T. Kay
AU  - E. Randall Bayless
AU  - Robert A. Solak
PY  - 2002
DO  - 10.3133/wri024213
UR  - https://pubs.usgs.gov/publication/wri024213
ID  - wri024213
ER  -