@misc{indiciaef9ca6b1f8218,
  title = {Catalog of thin sections available at the USGS Core Research Center, Denver, Colorado},
  author = {D.L. Richards and T.C. Michalski},
  year = {1987},
  doi = {10.3133/ofr87659},
  url = {https://pubs.usgs.gov/publication/ofr87659},
  note = {Source identifier: ofr87659}
}