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 AU - Erika E. Revised and digitized by Lentz PY - 2004 DO - 10.3133/i2530_v2 UR - https://pubs.usgs.gov/publication/i2530_v2 ID - i2530_v2 ER -