A Reconnaissance Survey of Wells in Eastern Wisconsin for Indications of Mississippi Valley Type Mineralization Open-file report; contains unpublished data that has not yet been peer-reviewed. Groundwater Data and Resources WOFR1992-03 A Reconnaissance Survey of Wells in Eastern Wisconsin for Indications of Mississippi Valley Type Mineralization Brown, B.A.; Maass, R.S.; 1992 Report: 31 p. Download Related Collections Open-File Report View Open-File Report