TY - RPRT TI - Generalized potentiometric-surface map and groundwater flow directions in the Madison aquifer near Jewel Cave National Monument, South Dakota AU - Todd M. Anderson AU - William G. Eldridge AU - Joshua F. Valder AU - Michael E. Wiles PY - 2019 DO - 10.3133/sir20195098 UR - https://pubs.usgs.gov/publication/sir20195098 ID - sir20195098 ER -