@misc{indiciae688bfa6c8093,
  title = {Paleotectonic investigations of the Pennsylvanian System in the United States, Part I: Introduction and regional analyses of the Pennsylvanian System},
  author = {Edwin D. McKee and Eleanor J. Crosby and George O. Bachman and Kenneth G. Bell and George H. Dixon and Sherwood E. Frezon and Ernest E. Glick and William P. Irwin and William W. Mallory and William J. Mapel and Edwin K. Maughan and George E. Prichard and Gerald L. Shideler and Gary F. Stewart and Harold R. Wanless and Richard F. Wilson},
  year = {1975},
  doi = {10.3133/pp8531},
  url = {https://pubs.usgs.gov/publication/pp8531},
  note = {Source identifier: pp8531}
}