TY  - RPRT
TI  - U.S. Geological Survey activities, fiscal year 1981
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1982
DO  - 10.3133/cir875
UR  - https://pubs.usgs.gov/publication/cir875
ID  - cir875
ER  -