@misc{indiciae16419c9cff3c,
  title = {Development of a national seamless database of topography and hydrologic derivatives},
  author = {Sandra K. Franken and Dean J. Tyler and Kristine L. Verdin},
  year = {2001},
  url = {https://pubs.usgs.gov/publication/70263765},
  note = {Source identifier: 70263765}
}