@misc{indiciae91f7647991f8,
  title = {Pliocene uplift of the grand canyon region - time of drainage adjustment},
  author = {E. D. McKee and E.H. McKee},
  year = {1972},
  doi = {10.1130/0016-7606(1972)83[1923:puotgc]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70207141},
  note = {Source identifier: 70207141}
}