@misc{indiciae77b61e971ba9,
  title = {A descriptive catalog of selected aerial photographs of geologic features in the United States},
  author = {Charles Storrow Denny and C.R. Warren and D.H. Dow and W.J. Dale},
  year = {1968},
  doi = {10.3133/pp590},
  url = {https://pubs.usgs.gov/publication/pp590},
  note = {Source identifier: pp590}
}