@misc{indiciaec38d0bfe5502,
  title = {Photogrammetric determination of movement on the Slumgullion Slide, Hinsdale County, Colorado 1985–1990},
  author = {W. K. Smith},
  year = {1993},
  doi = {10.3133/ofr93597},
  url = {https://pubs.usgs.gov/publication/ofr93597},
  note = {Source identifier: ofr93597}
}