@misc{indiciae86062bf97fe7,
  title = {Remote sensing and photogrammetric studies: Part D: repeatability of elevation measurements--Apollo photography},
  author = {Sherman S.C. Wu and Francis J. Schafer and Gary M. Nakata and Raymond Jordan},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/70042574},
  note = {Source identifier: 70042574}
}