@misc{indiciaee6e867cf0bb9,
  title = {Characteristics of the Mississippian-Pennsylvanian boundary and associated coal-bearing rocks in the southern Appalachians},
  author = {K. J. Englund and W.H. Gillespie and C. B. Cecil and J. F. Windolph and T. J. Crawford},
  year = {1985},
  doi = {10.3133/ofr85577},
  url = {https://pubs.usgs.gov/publication/ofr85577},
  note = {Source identifier: ofr85577}
}