TY  - RPRT
TI  - Ground-water levels in the United States, 1966-70, northwestern states
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1972
DO  - 10.3133/wsp1980
UR  - https://pubs.usgs.gov/publication/wsp1980
ID  - wsp1980
ER  -