TY  - RPRT
TI  - Geology of the Ashland quadrangle, Kentucky-Ohio, and the Catlettsburg quadrangle in Kentucky
AU  - Ernest Dobrovolny
AU  - Joseph A. Sharps
AU  - John C. Ferm
PY  - 1963
DO  - 10.3133/gq196
UR  - https://pubs.usgs.gov/publication/gq196
ID  - gq196
ER  -