1969. Hutchison, Harold C. (Harold Christy), 1925-. Scale approximately 1:380,000. State of Indiana, Dept. of Conservation.
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1970. Hutchison, Harold C. (Harold Christy), 1925-. Blue line print. 'Base modified from Indiana Department of Conservation, Geological Survey. Base map of portion of western Indiana, 1951.' Includes... Indiana Department of Geology and Natural Resources.
1974. Hutchison, Harold C. (Harold Christy), 1925-. Blue line print. 'Base modified from Indiana Department of Conservation, Geological Survey. Base map of portion of western Indiana, 1951.' Includes... Indiana Department of Geology and Natural Resources.
1975. Hutchison, Harold C. (Harold Christy), 1925-. Blue line print. 'Base modified from Indiana Department of Conservation, Geological Survey. Base map of portion of western Indiana, 1951.' Includes... Indiana Department of Geology and Natural Resources.
1959. Hutchison, Harold C. (Harold Christy), 1925-. Preliminary coal map no. 8--Margin.; Includes 2 geologic cross sections, location map, geologic column, index of mines, tables, and diagram of town... Indiana Dept. of Conservation, Geological Survey.
1961. Hutchison, Harold C. (Harold Christy), 1925-. Preliminary coal map no. 9--Margin.; Includes 1 ancillary map, 1 diagram showing township enumeration, 1 index map, 1 stratigraphic column, and 1 c... Indiana Dept. of Conservation, Geological Survey.