@misc{indiciae275eda04170d,
  title = {A digital photogrammetric method for measuring horizontal surficial movements on the slumgullion earthflow, Hinsdale county, Colorado},
  author = {P. S. Powers and M. Chiarle and W. Z. Savage},
  year = {1996},
  doi = {10.1016/0098-3004(96)00008-8},
  url = {https://pubs.usgs.gov/publication/70018480},
  note = {Source identifier: 70018480}
}