@misc{indiciaec63b8d7110bf,
  title = {Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part B - 2 Disks (Wordstar; 360K)},
  author = {Donley S. Collins and Robert R. Cobban and Eugene E. Foord and Jack A. Murphy},
  year = {1989},
  doi = {10.3133/ofr89206b},
  url = {https://pubs.usgs.gov/publication/ofr89206B},
  note = {Source identifier: ofr89206B}
}