TY - RPRT TI - Altitude of the potentiometric surface and changes in water levels in the Sparta-Memphis aquifer in eastern and southern Arkansas, spring 1986 AU - Joe Edds AU - Daniel J. Fitzpatrick PY - 1989 DO - 10.3133/wri884042 UR - https://pubs.usgs.gov/publication/wri884042 ID - wri884042 ER -