TY - RPRT TI - Potentiometric levels and water quality in the aquifers underlying Belvidere, Illinois, 1993–96 AU - P.C. Mills AU - C.A. Thomas AU - T.A. Brown AU - D.J. Yeskis AU - R.T. Kay PY - 1999 DO - 10.3133/wri984220 UR - https://pubs.usgs.gov/publication/wri984220 ID - wri984220 ER -