TY  - RPRT
TI  - Indiana coal and associated rock samples collected from 1975 to 1977
AU  - C.L. Oman
AU  - W.A. Hassenmueller
AU  - L. J. Bragg
PY  - 1992
DO  - 10.3133/ofr92682
UR  - https://pubs.usgs.gov/publication/ofr92682
ID  - ofr92682
ER  -