@misc{indiciaea93cc45d5845,
  title = {The U. S. Geological Survey's Gravity program in California, Hawaii, Nevada, and Oregon},
  author = {Howard W. Oliver},
  year = {2014},
  doi = {10.1029/tr046i001p00218},
  url = {https://pubs.usgs.gov/publication/70222559},
  note = {Source identifier: 70222559}
}