@misc{indiciae88f417270230,
  title = {Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1972},
  author = {George Vincent Cohee and W.B. Wright},
  year = {1974},
  doi = {10.3133/b1394a},
  url = {https://pubs.usgs.gov/publication/b1394A},
  note = {Source identifier: b1394A}
}