TY  - RPRT
TI  - The United States Geological Survey: A vision for the 21st century
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1993
DO  - 10.3133/70039481
UR  - https://pubs.usgs.gov/publication/70039481
ID  - 70039481
ER  -