@misc{indiciaecf19ac5d777c,
  title = {Map showing Quaternary geology and geomorphology of the Nankoweap Rapids area, Marble Canyon, Arizona},
  author = {Richard Hereford and K. J. Burke and K. S. Thompson},
  year = {1998},
  doi = {10.3133/i2608},
  url = {https://pubs.usgs.gov/publication/i2608},
  note = {Source identifier: i2608}
}