@misc{indiciae312f86940d61,
  title = {Spectrographic analyses of insoluble-residue samples, Harrison 1 degree by 2 degrees Quadrangle, Missouri and Arkansas; drill holes nos. 31, 32 and 34},
  author = {Barbara Chazin and M. S. Erickson},
  year = {1988},
  doi = {10.3133/ofr8853},
  url = {https://pubs.usgs.gov/publication/ofr8853},
  note = {Source identifier: ofr8853}
}