@misc{indiciae412769a807bb,
  title = {Geospatial resources for the geologic community: The USGS National Map},
  author = {Emitt C. Witt},
  year = {2015},
  doi = {10.1086/682008},
  url = {https://pubs.usgs.gov/publication/70173962},
  note = {Source identifier: 70173962}
}