TY  - RPRT
TI  - Stratigraphic framework and distribution of lignite in the Claiborne Group, Calhoun County, Arkansas
AU  - B.S. Hackman
PY  - 1984
DO  - 10.3133/i1490
UR  - https://pubs.usgs.gov/publication/i1490
ID  - i1490
ER  -