@misc{indiciaefa37bc48949b,
  title = {Stratigraphic nomenclature databases for the United States, its possessions and territories},
  author = {M. E. Mac Lachlan and Cynthia R. Murdock and Marilyn L. Hubert and W. A. Bryant and T.W. Judkins and O.B. Williams and E.D. Koozmin and R. C. Orndorff and S. W. Starratt and J. R. Le Compte},
  year = {1996},
  doi = {10.3133/ds6},
  url = {https://pubs.usgs.gov/publication/ds6},
  note = {Source identifier: ds6}
}