@misc{indiciae48de544617c5,
  title = {Preliminary isopach maps of the Cambrian Derby—Doerun Dolomite and the Cambrian Elvins Group, Rolla 1° x 2° quadrangle, Missouri},
  author = {J. L. Thacker and K. H. Anderson},
  year = {1979},
  doi = {10.3133/mf1002f},
  url = {https://pubs.usgs.gov/publication/mf1002F},
  note = {Source identifier: mf1002F}
}