TY - RPRT TI - Geochemical evolution of water in the Madison Aquifer in parts of Montana, South Dakota, and Wyoming AU - J.F. Busby AU - Niel Plummer AU - R. W. Lee AU - B.B. Hanshaw PY - 1991 DO - 10.3133/pp1273f UR - https://pubs.usgs.gov/publication/pp1273F ID - pp1273F ER -