TY - RPRT TI - Potentiometric Surfaces and Changes in Groundwater Levels in Selected Bedrock Aquifers in the Twin Cities Metropolitan Area, March-August 2008 and 1988-2008 AU - Christopher A. Sanocki AU - Susan K. Langer AU - Jason C. Menard PY - 2008 DO - 10.3133/sir20095226 UR - https://pubs.usgs.gov/publication/sir20095226 ID - sir20095226 ER -