@misc{indiciaeaf9af4bdd092,
  title = {Helicopter airborne electromagnetic survey (using the Dighem II system) of parts of the Lake City caldera, Hinsdale County, Colorado},
  author = {D.C. Fraser and Z. Dvorak},
  year = {1980},
  doi = {10.3133/ofr80917},
  url = {https://pubs.usgs.gov/publication/ofr80917},
  note = {Source identifier: ofr80917}
}