@misc{indiciae150145e9c561,
  title = {Mineral-resource appraisal of the Rolla 1° x 2° quadrangle, Missouri, as of September 1980- A nontechnical summary},
  author = {Walden P. Pratt},
  year = {1983},
  doi = {10.3133/cir869},
  url = {https://pubs.usgs.gov/publication/cir869},
  note = {Source identifier: cir869}
}