@misc{indiciae4a5c0c23f4f3,
  title = {FGDC Digital Cartographic Standard for Geologic Map Symbolization (PostScript Implementation)},
  author = {U.S. Geological Survey},
  year = {2006},
  doi = {10.3133/tm11a2},
  url = {https://pubs.usgs.gov/publication/tm11A2},
  note = {Source identifier: tm11A2}
}