TY - RPRT TI - Effects of Potential Changes in Groundwater Withdrawals from the Sparta Aquifer on Water-Level Altitudes in Jefferson County, Arkansas AU - John B. Czarnecki PY - 2009 DO - 10.3133/sir20095234 UR - https://pubs.usgs.gov/publication/sir20095234 ID - sir20095234 ER -