@misc{indiciaea1e6fcf2b039,
  title = {Topographic characteristics of drainage basins},
  author = {Walter Basil Langbein},
  year = {1947},
  doi = {10.3133/wsp968c},
  url = {https://pubs.usgs.gov/publication/wsp968C},
  note = {Source identifier: wsp968C}
}