@misc{indiciae84a4ff3cb3dd,
  title = {Aeromagnetic map of North Park and vicinity, north-central Colorado},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1970},
  doi = {10.3133/ofr70338},
  url = {https://pubs.usgs.gov/publication/ofr70338},
  note = {Source identifier: ofr70338}
}