TY  - RPRT
TI  - Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian Basin from Campbell County Kentucky, to Tazwell County, Virginia
AU  - Robert T. Ryder
AU  - John E. Repetski
AU  - Anita G. Harris
PY  - 1997
DO  - 10.3133/i2530
UR  - https://pubs.usgs.gov/publication/i2530
ID  - i2530
ER  -