@misc{indiciae85a4be10c2ff,
  title = {Preliminary geologic map, west half of Rolla 1 degree x 2 degrees quadrangle, Missouri},
  author = {Ira R. Satterfield and M.A. Middendorf and P.E. Gerdemann and W. P. Pratt},
  year = {1982},
  doi = {10.3133/ofr8261},
  url = {https://pubs.usgs.gov/publication/ofr8261},
  note = {Source identifier: ofr8261}
}