TY  - RPRT
TI  - Minor element content of coal from Illinois beds 5 and 6 and their correlatives in Indiana and western Kentucky
AU  - Peter Zubovic
PY  - 1960
DO  - 10.3133/ofr60165
UR  - https://pubs.usgs.gov/publication/ofr60165
ID  - ofr60165
ER  -