@misc{indiciae87cc1a05ffdd,
  title = {Principal facts for gravity stations in the Yuma, Arizona, and Blythe, California areas},
  author = {Donald L. Peterson and Arthur Comradi and Adel A. R. Zohdy},
  year = {1967},
  doi = {10.3133/ofr67176},
  url = {https://pubs.usgs.gov/publication/ofr67176},
  note = {Source identifier: ofr67176}
}