TY - RPRT TI - Progress report on the ground-water resources of the Lower South Platte River Valley between Hardin, Colorado, and Paxton, Nebraska, with a section on the chemical quality of the ground water AU - L.J. Bjorklund AU - J.A. Tavelli AU - H. A. Swenson PY - 1949 DO - 10.3133/ofr4955 UR - https://pubs.usgs.gov/publication/ofr4955 ID - ofr4955 ER -