@misc{indiciaedea65032a803,
  title = {Contour maps of uranium, uranium-thorium ratio, and total field magnetics, Lake City area, San Juan Mountains, Colorado},
  author = {William D. Heran},
  year = {1981},
  doi = {10.3133/ofr81568},
  url = {https://pubs.usgs.gov/publication/ofr81568},
  note = {Source identifier: ofr81568}
}