TY  - RPRT
TI  - Geology of the Portsmouth quadrangle, Kentucky-Ohio, and parts of the Wheelersburg and New Boston quadrangles, Kentucky
AU  - Richard A. Sheppard
PY  - 1964
DO  - 10.3133/gq312
UR  - https://pubs.usgs.gov/publication/gq312
ID  - gq312
ER  -