@misc{indiciaea1721fd58ecc,
  title = {Principal facts for gravity stations in the Clearwater and Blackfoot River valleys, Montana},
  author = {Dolores M. Wilson},
  year = {1978},
  doi = {10.3133/ofr78103},
  url = {https://pubs.usgs.gov/publication/ofr78103},
  note = {Source identifier: ofr78103}
}