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Bassett, John L., Hasenmueller, Nancy R.
1980
DOE813
Hasenmueller, N. R., and Bassett, J. L., 1980, Map of Indiana showing structure on top of the Trenton Limestone (Ordovician): Indiana Geological Survey Department of Energy Report 813, scale 1:500,000.
Indiana Geological & Water Survey - Department of Energy Report 813