@misc{indiciaef3b95f24d54e,
  title = {Contributions to economic geology, 1920, Part II, Mineral fuels--Character of coal in the Thomas bed near Harrison, West Virginia},
  author = {M. R. Campbell},
  year = {1921},
  doi = {10.3133/b716h},
  url = {https://pubs.usgs.gov/publication/b716H},
  note = {Source identifier: b716H}
}