TY  - RPRT
TI  - Chemical analyses of coal from the Krebs Group (Pennsylvanian) Arkoma Basin, eastern Oklahoma
AU  - Ricky T. Hildebrand
PY  - 1981
DO  - 10.3133/ofr81894
UR  - https://pubs.usgs.gov/publication/ofr81894
ID  - ofr81894
ER  -