@misc{indiciaef04cb5d57550,
  title = {Coal-mine accidents, their causes and prevention (a preliminary statistical report)},
  author = {Clarence A. Hall and Walter Otheman Snelling and J.A. Holmes},
  year = {1907},
  doi = {10.3133/b333},
  url = {https://pubs.usgs.gov/publication/b333},
  note = {Source identifier: b333}
}