National Geologic Map Database
General Information
- Title: Use of isotopes to identify sources of ground water, estimate ground-water flow rates, and assess aquifer vulnerability in the Calument region of northwestern Indiana and northeastern Illinois
- Author(s): Kay, R.T., Bayless, E.R., and Solak, R.A.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Water-Resources Investigations Report 2002-4213
- Publication Date: 2002
- Map Scale: 1:161,000
- Cross Section: None
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