@misc{indiciae87e3a91f3bab,
  title = {Tour guide: John Wesley Powell Federal Building},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/70039072},
  url = {https://pubs.usgs.gov/publication/70039072},
  note = {Source identifier: 70039072}
}