@misc{indiciae491dbffadda7,
  title = {Progress on water resource investigations in the Lower Colorado River area},
  author = {C. C. McDonald},
  year = {1963},
  doi = {10.3133/ofr6395},
  url = {https://pubs.usgs.gov/publication/ofr6395},
  note = {Source identifier: ofr6395}
}