TY - RPRT TI - Review of Trace-Element Field-Blank Data Collected for the California Groundwater Ambient Monitoring and Assessment (GAMA) Program, May 2004-January 2008 AU - Lisa D. Olsen AU - Miranda S. Fram AU - Kenneth Belitz PY - 2010 DO - 10.3133/sir20095220 UR - https://pubs.usgs.gov/publication/sir20095220 ID - sir20095220 ER -