TY - RPRT TI - Potentiometric surface, 2012, and water-level differences, 2005-12, of the Sparta Aquifer in north-central Louisiana AU - Benton D. McGee AU - Jeffrey A. Brantly PY - 2015 DO - 10.3133/sim3313 UR - https://pubs.usgs.gov/publication/sim3313 ID - sim3313 ER -