@misc{indiciae5e8a78bdec12,
  title = {The Middle Jurassic Entrada Sandstone near Gallup, New Mexico},
  author = {J. F. Robertson and R. B. O'Sullivan},
  year = {2001},
  url = {https://pubs.usgs.gov/publication/70024226},
  note = {Source identifier: 70024226}
}