@misc{indiciaef01a85ae8fad,
  title = {Investigation of the water resources of the lower Colorado River area},
  author = {C. C. McDonald},
  year = {1961},
  doi = {10.3133/ofr6191},
  url = {https://pubs.usgs.gov/publication/ofr6191},
  note = {Source identifier: ofr6191}
}