@misc{indiciaef495a9b99c40,
  title = {Geographic information system (GIS) procedure for preliminary delineation of debris-flow hazard areas from a digital terrain model, Madison County, Virginia},
  author = {R. H. Campbell and P. G. Chirico},
  year = {1999},
  doi = {10.3133/ofr99336},
  url = {https://pubs.usgs.gov/publication/ofr99336},
  note = {Source identifier: ofr99336}
}