TY - RPRT TI - Maps showing altitude of the potentiometric surface and changes in water level of the Sparta sand and Memphis sand aquifers in Eastern Arkansas, spring 1983 AU - Joe Edds AU - Daniel J. Fitzpatrick PY - 1984 DO - 10.3133/wri844265 UR - https://pubs.usgs.gov/publication/wri844265 ID - wri844265 ER -