@misc{indiciaec880927a17c9,
  title = {Geophysics Advisor Expert System},
  author = {G.R. Olhoeft},
  year = {1988},
  doi = {10.3133/ofr88399b},
  url = {https://pubs.usgs.gov/publication/ofr88399B},
  note = {Source identifier: ofr88399B}
}