@misc{indiciaee9e6cb31c509,
  title = {Isopach mapping by photogeologic methods as an aid in the location of swales and channels in the Monument Valley area, Arizona},
  author = {Irving Jerome Witkind and W. R. Hemphill and C. L. Pillmore and R. H. Morris},
  year = {1960},
  doi = {10.3133/b1043d},
  url = {https://pubs.usgs.gov/publication/b1043D},
  note = {Source identifier: b1043D}
}