@misc{indiciae9a93def97068,
  title = {Selection of colors and patterns for geologic maps of the U.S. Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2005},
  doi = {10.3133/tm11b1},
  url = {https://pubs.usgs.gov/publication/tm11B1},
  note = {Source identifier: tm11B1}
}