@misc{indiciae7f8e7e6c9d66,
  title = {A manual for the installation of bench marks on active volcanoes},
  author = {M.P. Doukas},
  year = {1993},
  doi = {10.3133/ofr93176b},
  url = {https://pubs.usgs.gov/publication/ofr93176B},
  note = {Source identifier: ofr93176B}
}