@misc{indiciae2644b36b6d5d,
  title = {A primer on explosives for coal miners},
  author = {Charles E. Munroe and Clarence A. Hall},
  year = {1909},
  doi = {10.3133/b423},
  url = {https://pubs.usgs.gov/publication/b423},
  note = {Source identifier: b423}
}