@misc{indiciaea0801a33809b,
  title = {Geologic map and sections of the Happy Valley Quadrangle, Cochise County, Arizona},
  author = {Harald Drewes},
  year = {1974},
  doi = {10.3133/i832},
  url = {https://pubs.usgs.gov/publication/i832},
  note = {Source identifier: i832}
}