TY - RPRT TI - Louisiana ground-water map no. 6: Potentiometric surface, 1990, and water-level changes, 1974-90, of the Mississippi River alluvial aquifer in northeastern Louisiana AU - Ronald C. Seanor AU - Charles W. Smoot PY - 1995 DO - 10.3133/wri954146 UR - https://pubs.usgs.gov/publication/wri954146 ID - wri954146 ER -