@misc{indiciaec8c82f7f7f34,
  title = {Geologic map of the Rolla 1 degree by 2 degrees Quadrangle, Missouri},
  author = {W. P. Pratt and Mark A. Middendorf and I.R. Satterfield and Paul E. Gerdemann},
  year = {1992},
  doi = {10.3133/i1998},
  url = {https://pubs.usgs.gov/publication/i1998},
  note = {Source identifier: i1998}
}