TY  - RPRT
TI  - Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Morrow County, Ohio, to Pendleton County, West Virginia
AU  - Robert T. Ryder
PY  - 1992
DO  - 10.3133/b1839g
UR  - https://pubs.usgs.gov/publication/b1839G
ID  - b1839G
ER  -