@misc{indiciae08e68b0abb17,
  title = {Geologic map of Jumpup Canyon and Big Springs quadrangles, Mohave and Coconino counties, Arizona},
  author = {G. H. Billingsley},
  year = {1992},
  doi = {10.3133/i2290},
  url = {https://pubs.usgs.gov/publication/i2290},
  note = {Source identifier: i2290}
}