@misc{indiciae19144f0b5a87,
  title = {Paleotectonic investigations of the Pennsylvanian system in the United States, Part II: Interpretive summary and special features of the Pennsylvanian system},
  author = {Edwin D. McKee and Eleanor J. Crosby and John C. Ferm and Walter D. Keller and James M. Schopf and Theodore R. Walker and Harold R. Wanless and Cynthia Roseman Wright},
  year = {1975},
  doi = {10.3133/pp853},
  url = {https://pubs.usgs.gov/publication/pp853},
  note = {Source identifier: pp853}
}