@misc{indiciaee8f41f6c3928,
  title = {Monitoring land subsidence in Sacramento Valley, California, using GPS},
  author = {J. C. Blodgett and M. E. Ikehara and Gary E. Williams},
  year = {1990},
  doi = {10.1061/(asce)0733-9453(1990)116:2(112)},
  url = {https://pubs.usgs.gov/publication/70016162},
  note = {Source identifier: 70016162}
}