@misc{indiciae538339d6e1f8,
  title = {Coal fields of King County, Washington},
  author = {W.C. Warren and H. Nerbisrath and R.M. Grivetti and S.P. Brown},
  year = {1945},
  doi = {10.3133/ofr4517},
  url = {https://pubs.usgs.gov/publication/ofr4517},
  note = {Source identifier: ofr4517}
}