@misc{indiciae50367684cd26,
  title = {Subsurface correlations and sequence stratigraphic interpretations of lower Silurian strata in the Appalachian Basin of northeast Ohio, southwest New York, and northwest Pennsylvania},
  author = {Robert D. Hettinger},
  year = {2001},
  doi = {10.3133/i2741},
  url = {https://pubs.usgs.gov/publication/i2741},
  note = {Source identifier: i2741}
}