@misc{indiciaef040266b18ba,
  title = {Digital mapping techniques '99 -- workshop proceedings},
  author = {David R. Soller},
  year = {1999},
  doi = {10.3133/ofr99386},
  url = {https://pubs.usgs.gov/publication/ofr99386},
  note = {Source identifier: ofr99386}
}