@misc{indiciaeec414c0633e1,
  title = {Description of insoluble residues from the T.P. Russell No. 1 drill hole and other drill holes in southeastern Missouri},
  author = {D. S. Collins and R.A. Bohm},
  year = {1993},
  doi = {10.3133/ofr93291},
  url = {https://pubs.usgs.gov/publication/ofr93291},
  note = {Source identifier: ofr93291}
}