TY  - RPRT
TI  - Geologic map of parts of the Benham and Appalachia quadrangles, Harlan and Letcher Counties, Kentucky
AU  - A.J. Froelich
AU  - Byron D. Stone
PY  - 1973
DO  - 10.3133/gq1059
UR  - https://pubs.usgs.gov/publication/gq1059
ID  - gq1059
ER  -