@misc{indiciae086f06e4466b,
  title = {Principal facts for gravity stations in the Challis, Idaho, 1 x 2 degree quadrangle},
  author = {Michael Webring and D. R. Mabey},
  year = {1981},
  doi = {10.3133/ofr81652},
  url = {https://pubs.usgs.gov/publication/ofr81652},
  note = {Source identifier: ofr81652}
}