@misc{indiciae3c8a235c14ac,
  title = {A descriptive catalog of selected aerial photographs of geologic features in areas outside the United States},
  author = {C.R. Warren and D. L. Schmidt and C. S. Denny and W.J. Dale},
  year = {1969},
  doi = {10.3133/pp591},
  url = {https://pubs.usgs.gov/publication/pp591},
  note = {Source identifier: pp591}
}