@misc{indiciaed0758793989c,
  title = {Geology, mineral resources, and mineral industry: Appendix},
  author = {W. P. Irwin and D.B. Tatlock and F. Weibelt and G.B. Shea and R.B. Mauerer},
  year = {1955},
  url = {https://pubs.usgs.gov/publication/70197727},
  note = {Source identifier: 70197727}
}