@misc{indiciae2809ec81b7a5,
  title = {Principal facts for gravity stations, northern Sonora, Mexico},
  author = {M. Dean Kleinkopf and M. F. de la Fuente Dutch and D. L. Peterson and C.A. Renovato and Viki Bankey},
  year = {1980},
  doi = {10.3133/ofr80886},
  url = {https://pubs.usgs.gov/publication/ofr80886},
  note = {Source identifier: ofr80886}
}