TY  - RPRT
TI  - Knowledge-based GIS techniques applied to geological engineering
AU  - E. Lynn Usery
AU  - Phyllis Altheide
AU  - Robin R. P. Deister
AU  - David J. Barr
PY  - 1988
UR  - https://pubs.usgs.gov/publication/70013690
ID  - 70013690
ER  -