@misc{indiciae17f067f6211f,
  title = {A section of the Kaibab limestone in Kaibab Gulch, Utah},
  author = {L. F. Noble},
  year = {1928},
  doi = {10.3133/pp150c},
  url = {https://pubs.usgs.gov/publication/pp150C},
  note = {Source identifier: pp150C}
}