@misc{indiciaeeae9195dcd26,
  title = {Surficial geology of the northern San Luis Valley, Saguache, Fremont, Custer, Alamosa, Rio Grande, Conejos, and Costilla Counties, Colorado},
  author = {Chester A. Ruleman and Theodore R. Brandt},
  year = {2021},
  doi = {10.3133/sim3475},
  url = {https://pubs.usgs.gov/publication/sim3475},
  note = {Source identifier: sim3475}
}