@misc{indiciaef403af1159e2,
  title = {The desert land forms of Peru; a preliminary photographic atlas},
  author = {M. J. Grolier and G. E. Ericksen and J.F. McCauley and E. C. Morris},
  year = {1974},
  doi = {10.3133/ofr741044},
  url = {https://pubs.usgs.gov/publication/ofr741044},
  note = {Source identifier: ofr741044}
}