Cite
Eggert, Donald L., cartographer.. (n.d.). Map of southwestern Indiana showing locations of coal slurry ponds and preparation plants. Indiana Geological Survey. http://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00195 (map)
Available from: https://geo.btaa.org/catalog/b563e0fc-e0cf-4683-a0f2-69814b4b3dd5