@misc{indiciae3daa90f7e9b9,
  title = {Obtaining maps and data from the U.S. Geological Survey},
  author = {Cheryl A. Hallam},
  year = {1982},
  doi = {10.1016/0198-9715(82)90016-3},
  url = {https://pubs.usgs.gov/publication/70011229},
  note = {Source identifier: 70011229}
}