@misc{indiciae546a22e1dbe5,
  title = {Age and paleoenvironment of the imperial formation near San Gorgonio Pass, Southern California},
  author = {K. McDougall and R.Z. Poore and J. Matti},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/70021974},
  note = {Source identifier: 70021974}
}