RT Journal Article SR Electronic T1 Chicago's 132-year effort to provide safe drinking water JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 19A OP 25A DO 10.2489/jswc.72.2.19A VO 72 IS 2 A1 Olson, Kenneth R. A1 Morton, Lois Wright YR 2017 UL http://www.jswconline.org/content/72/2/19A.abstract AB