@misc{indiciaeb14178654aa4,
  title = {Reconnaissance geologic map of the Swallows quadrangle, Pueblo County, Colorado},
  author = {G. R. Scott},
  year = {1972},
  doi = {10.3133/mf354},
  url = {https://pubs.usgs.gov/publication/mf354},
  note = {Source identifier: mf354}
}