@misc{indiciaefe1bd88e24cf,
  title = {Descriptions of four measured outcrop sections of Upper Devonian and Lower Mississippian strata in Warren and Elk counties, Pennsylvania},
  author = {S. P. Schweinfurth and M.A. Person and N. L. Hickling},
  year = {1982},
  doi = {10.3133/ofr82133},
  url = {https://pubs.usgs.gov/publication/ofr82133},
  note = {Source identifier: ofr82133}
}