TY  - RPRT
TI  - Research, investigations, and technical developments : National Mapping Program 1985-1986
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1988
DO  - 10.3133/ofr87315
UR  - https://pubs.usgs.gov/publication/ofr87315
ID  - ofr87315
ER  -