TY  - RPRT
TI  - Tritium/Helium-3 Apparent Ages of Shallow Ground Water, Portland Basin, Oregon, 1997-98
AU  - Stephen R. Hinkle
PY  - 2009
DO  - 10.3133/sir20095057
UR  - https://pubs.usgs.gov/publication/sir20095057
ID  - sir20095057
ER  -