@misc{indiciae5c29bfc00e93,
  title = {Principal facts for gravity data compiled for the Conterminous United States Mineral Appraisal Program, Tonopah 1- by 2-degree quadrangle, Nevada, A. Documentation (paper copy)},
  author = {Donald Plouff},
  year = {1990},
  doi = {10.3133/ofr90457a},
  url = {https://pubs.usgs.gov/publication/ofr90457A},
  note = {Source identifier: ofr90457A}
}