Citation

Carol L. Conolly (Database Compiler). Agnieszka Drobniak (Database Compiler). Maria Mastalerz (Database Compiler). Indiana Geological Survey. (2010-08-25). Coal Resource Data, Derived from the National Coal Resource Data System: Indiana, 2010. [Shapefile]. Retrieved from https://earthworks.stanford.edu/catalog/4d4f98eb-17da-4bc6-a8d2-31e2ee756686