@misc{indiciaee07448c8b287,
  title = {The Conterminous United States Mineral-Resource Assessment Program— Background information to accompany folio of geologic and mineral-resources maps of the Rolla 1° x 2° quadrangle, Missouri},
  author = {Walden P. Pratt},
  year = {1991},
  doi = {10.3133/cir1068},
  url = {https://pubs.usgs.gov/publication/cir1068},
  note = {Source identifier: cir1068}
}