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.
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1975. Map checked with aerial photographs dated 10/12/67.' Includes 9 insets. Scale approximately 1:165,000; Polyconic projection Prepared by the Divisio... Division of Planning, Indiana State Highway Commission.
1975. Johnson, Fred F. Plastic index device in pocket. Includes indexes, A-C of street index on attached sheet and 'Inset map of adjacent areas in Johnson County.' Scale ...
1975. Appears to be a reprint of a map from the 1975 Lake Monroe Land Suitability Study. Scale 1:24,000.