@misc{indiciae3e6531e59a4f,
  title = {Extracting topographic structure from digital elevation data for geographic information-system analysis},
  author = {Susan K. Jenson and Julia O. Domingue},
  year = {1988},
  url = {https://pubs.usgs.gov/publication/70142175},
  note = {Source identifier: 70142175}
}