@misc{indiciaede33835094bc,
  title = {Ground-water resources of the San Luis Valley, Colorado, with a section on an inflow-outflow study of the area},
  author = {William J. Powell and Philip B. Mutz},
  year = {1958},
  doi = {10.3133/wsp1379},
  url = {https://pubs.usgs.gov/publication/wsp1379},
  note = {Source identifier: wsp1379}
}