@misc{indiciae037834b1af3d,
  title = {Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Medina County, Ohio, through southwestern and south-central Pennsylvania to Hampshire County, West Virginia},
  author = {Robert T. Ryder and Anita G. Harris and John E. Repetski and Robert D. Crangle},
  year = {2014},
  doi = {10.3133/pp1708e.2.2},
  url = {https://pubs.usgs.gov/publication/pp1708E.2.2},
  note = {Source identifier: pp1708E.2.2}
}