@misc{indiciae90e7cd3f3a67,
  title = {Computer-assisted photogrammetric mapping systems for geologic studies-A progress report},
  author = {C. L. Pillmore and K.S. Dueholm and H.S. Jepsen and C.H. Schuch},
  year = {1981},
  doi = {10.1016/0031-8663(81)90012-0},
  url = {https://pubs.usgs.gov/publication/70011984},
  note = {Source identifier: 70011984}
}