@misc{indiciae1c0a3ec5bf88,
  title = {A bibliography of geomorphometry, the quantitative representation of topography; supplement 3.0},
  author = {R.J. Pike},
  year = {1999},
  doi = {10.3133/ofr99140},
  url = {https://pubs.usgs.gov/publication/ofr99140},
  note = {Source identifier: ofr99140}
}