@misc{indiciae8afec20be91b,
  title = {Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1974},
  author = {George Vincent Cohee and W.B. Wright},
  year = {1975},
  doi = {10.3133/b1405a},
  url = {https://pubs.usgs.gov/publication/b1405A},
  note = {Source identifier: b1405A}
}