TY  - RPRT
TI  - Estimated average annual ground-water pumpage in the Portland Basin, Oregon and Washington 1987-88
AU  - C. A. Collins
AU  - T.M. Broad
PY  - 1993
DO  - 10.3133/wri914018
UR  - https://pubs.usgs.gov/publication/wri914018
ID  - wri914018
ER  -