@misc{indiciaebc34e6457da6,
  title = {Spectrographic and chemical analyses of whole-rock and insoluble-residue samples, Rolla 1 degree x 2 degrees quadrangle, Missouri: Drill hole no. 7},
  author = {J.G. Viets and E. L. Mosier and S.K. McDanal and D. F. Siems},
  year = {1978},
  doi = {10.3133/ofr78470i},
  url = {https://pubs.usgs.gov/publication/ofr78470I},
  note = {Source identifier: ofr78470I}
}