@misc{indiciae727f4b67de38,
  title = {Spectrographic and chemical analyses of whole-rock and insoluble-residue samples, Rolla 1 degrees by 2 degrees quadrangle, Missouri; drill holes No. 28 and 29},
  author = {J.G. Viets and E. L. Mosier and M. S. Erickson and S.K. McDanal},
  year = {1979},
  doi = {10.3133/ofr79364a},
  url = {https://pubs.usgs.gov/publication/ofr79364A},
  note = {Source identifier: ofr79364A}
}