@misc{indiciae700b77005c3f,
  title = {Map showing distribution and estimated thickness of alluvial deposits in the Tucson area, Arizona},
  author = {M. C. Cooley},
  year = {1973},
  doi = {10.3133/i844c},
  url = {https://pubs.usgs.gov/publication/i844C},
  note = {Source identifier: i844C}
}