TY  - RPRT
TI  - The Fire Clay and Whitesburg coals in the Hyden quadrangle, Leslie, Clay, and Perry Counties, Kentucky
AU  - John Edward Johnston
AU  - W. A. Heck
PY  - 1950
DO  - 10.3133/coal5
UR  - https://pubs.usgs.gov/publication/coal5
ID  - coal5
ER  -