TY  - RPRT
TI  - The quality of our nation's waters: Water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009
AU  - Bruce D. Lindsey
AU  - Tammy M. Zimmerman
AU  - Melinda J. Chapman
AU  - Charles A. Cravotta
AU  - Zoltan Szabo
PY  - 2015
DO  - 10.3133/cir1354
UR  - https://pubs.usgs.gov/publication/cir1354
ID  - cir1354
ER  -