@misc{indiciaec89b2208a817,
  title = {Monitoring crustal deformation in the Geysers-Clear Lake geothermal area, California},
  author = {Ben Elder Lofgren},
  year = {1978},
  doi = {10.3133/ofr78597},
  url = {https://pubs.usgs.gov/publication/ofr78597},
  note = {Source identifier: ofr78597}
}