@misc{indiciaea86ae961bb2d,
  title = {A procedure for evaluating environmental impact},
  author = {Luna Bergere Leopold and Frank Eldridge Clarke and Bruce B. Hanshaw and James R. Balsley},
  year = {1971},
  doi = {10.3133/cir645},
  url = {https://pubs.usgs.gov/publication/cir645},
  note = {Source identifier: cir645}
}