@misc{indiciae041aacb247cd,
  title = {Principal facts for gravity stations in the Redding and Ukiah AMS sheets, California},
  author = {Andrew Griscom},
  year = {1970},
  doi = {10.3133/ofr70143},
  url = {https://pubs.usgs.gov/publication/ofr70143},
  note = {Source identifier: ofr70143}
}