@misc{indiciae2c90d646892c,
  title = {Mines, prospects, and occurrences of metallic minerals and barite, Springfield 1° by 2° Quadrangle, Missouri},
  author = {H. M. Wharton},
  year = {1987},
  doi = {10.3133/mf1830c},
  url = {https://pubs.usgs.gov/publication/mf1830C},
  note = {Source identifier: mf1830C}
}