@misc{indiciae2a4edfbfd260,
  title = {Digital files of geologic map symbols with cartographic specifications},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1995},
  doi = {10.3133/ofr95526},
  url = {https://pubs.usgs.gov/publication/ofr95526},
  note = {Source identifier: ofr95526}
}