@misc{indiciae6ad5d136f474,
  title = {Correlation of the Charleston Sandstone of the proposed Pennsylvanian stratotype with strata in eastern Kentucky, western West Virginia, and southern Ohio},
  author = {W.F. Outerbridge},
  year = {1989},
  doi = {10.3133/mf2110},
  url = {https://pubs.usgs.gov/publication/mf2110},
  note = {Source identifier: mf2110}
}