1986. Weber, Licia. Blue line print. Includes location map. Scale approximately 1:350,000. Compiled by Licia A. Weber, January 1986. Indiana Geological Survey.
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2000. Eaton, Nathan (Cartographer) and Weber, Licia. Compilation complete through October 1997.' 'Base map digitized from 1:500,000 scale, 1978 U.S. Geological Survey map of Indiana.' Includes text an... Indiana Geological Survey.