@misc{indiciae5e14e1ccdc21,
  title = {High-gain, long-period seismograph station installation report, Zongo Valley, Bolivia},
  author = {Charles R. Hutt},
  year = {1972},
  doi = {10.3133/ofr75370},
  url = {https://pubs.usgs.gov/publication/ofr75370},
  note = {Source identifier: ofr75370}
}