Walker, R., “Groundwater Protection Programs in Marion County, Indiana,” Professional Geologists of Indiana Continuing Education Seminar, Speedway, IN, November 14, 2018.
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Walker, R., “Groundwater Protection Programs in Marion County, Indiana,” Professional Geologists of Indiana Continuing Education Seminar, Speedway, IN, November 14, 2018.
- Midwestern States Environmental Consultants Association
- Environmental & Engineering Geophysical Society
- Professional Geologists of Indiana, Inc.
- National Groundwater Association
- American Societies of Chemical / Civil Engineers
- Association of Environmental and Engineering Geologists
- Indiana Association for Environmental Professionals
- Geological Society of America
- Indiana Geographic Information Council
- Economy of Communion
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