@misc{indiciae0210c6208ea3,
  title = {The Santo Tomas cannel coal, Webb County, Texas},
  author = {G. H. Ashley},
  year = {1919},
  doi = {10.3133/b691i},
  url = {https://pubs.usgs.gov/publication/b691I},
  note = {Source identifier: b691I}
}