@misc{indiciaec1aa86420280,
  title = {Comparison of SLAR images and small-scale, low-sun aerial photographs},
  author = {Malcolm M. Clark},
  year = {1971},
  doi = {10.1130/0016-7606(1971)82[1735:cosias]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70227348},
  note = {Source identifier: 70227348}
}