TY  - RPRT
TI  - Proceedings of the Illinois Basin energy and mineral resources workshop
AU  - Jennie L. Ridgley
AU  - James A. Drahovzal
AU  - B.D. Keith
AU  - Dennis R. Kolata
PY  - 1994
DO  - 10.3133/ofr94298
UR  - https://pubs.usgs.gov/publication/ofr94298
ID  - ofr94298
ER  -