@misc{indiciae74d28f9912e6,
  title = {Photogrammetric determination of surface altitude, velocity, and calving rate of Columbia Glacier, Alaska, 1983-91},
  author = {Robert M. Krimmel},
  year = {1992},
  doi = {10.3133/ofr92104},
  url = {https://pubs.usgs.gov/publication/ofr92104},
  note = {Source identifier: ofr92104}
}