TY  - RPRT
TI  - Description of the physical environment and coal-mining history of west-central Indiana, with emphasis on six small watersheds
AU  - Jeffrey D. Martin
AU  - Charles G. Crawford
AU  - R.F. Duwelius
AU  - D.E. Renn
PY  - 1987
DO  - 10.3133/ofr87212
UR  - https://pubs.usgs.gov/publication/ofr87212
ID  - ofr87212
ER  -