@misc{indiciae659effd9e5c6,
  title = {A U.S. Geological Survey data standard: Codes for the identification of hydrologic units in the United States and the Caribbean outlying areas},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1982},
  doi = {10.3133/cir878a},
  url = {https://pubs.usgs.gov/publication/cir878A},
  note = {Source identifier: cir878A}
}