TY  - RPRT
TI  - A procedure for evaluating environmental impact
AU  - Luna Bergere Leopold
AU  - Frank Eldridge Clarke
AU  - Bruce B. Hanshaw
AU  - James R. Balsley
PY  - 1971
DO  - 10.3133/cir645
UR  - https://pubs.usgs.gov/publication/cir645
ID  - cir645
ER  -