@misc{indiciaecea19029487a,
  title = {The Bright Angel and Mesa Butte fault systems of northern Arizona},
  author = {Eugene Merle Shoemaker and R. L. Squires and M. J. Abrams},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/70227370},
  note = {Source identifier: 70227370}
}