@misc{indiciae078bf5f657e4,
  title = {Cartographic and digital standard for geologic map information, Part C: Principles, content, symbols, colors, patterns, and codes},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1995},
  doi = {10.3133/ofr95525c},
  url = {https://pubs.usgs.gov/publication/ofr95525C},
  note = {Source identifier: ofr95525C}
}