TY - RPRT TI - Simulation of ground-water flow and areas contributing ground water to production wells, Cadillac, Michigan AU - Christopher J. Hoard AU - D.B. Westjohn PY - 2005 DO - 10.3133/ofr20051012 UR - https://pubs.usgs.gov/publication/ofr20051012 ID - ofr20051012 ER -