@misc{indiciaee07cbd1371c5,
  title = {Elevation derivatives for national applications},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2005},
  doi = {10.3133/fs20053049},
  url = {https://pubs.usgs.gov/publication/fs20053049},
  note = {Source identifier: fs20053049}
}