@misc{indiciae48e163a15533,
  title = {Knowledge-based GIS techniques applied to geological engineering},
  author = {E. Lynn Usery and Phyllis Altheide and Robin R. P. Deister and David J. Barr},
  year = {1988},
  url = {https://pubs.usgs.gov/publication/70013690},
  note = {Source identifier: 70013690}
}