@misc{indiciae64c1cd4bdc1e,
  title = {Preliminary palynological zonation of the Chinle formation, southwestern U.S.A., and its correlation to the Newark supergroup (eastern U.S.A.)},
  author = {R. J. Litwin and A. Traverse and S.R. Ash},
  year = {1991},
  doi = {10.1016/0034-6667(91)90028-2},
  url = {https://pubs.usgs.gov/publication/70016725},
  note = {Source identifier: 70016725}
}