@misc{indiciaee1671f64a17c,
  title = {Preliminary structure contour map of the Branson area Las Animas County, Colorado and Union County, New Mexico},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1942},
  doi = {10.3133/ofr4330},
  url = {https://pubs.usgs.gov/publication/ofr4330},
  note = {Source identifier: ofr4330}
}