1. S. 433, Public Law 93-523, Safe Drinking Water Act. 93rd Congress Washington, D.C. 1974
2. Maddox Franklin D. Water Supply and Consumer Costs, Cincinnati Standard Metropolitan Statistical Area. unpublished report for the Bu. of Water Hygiene 1970
3. Clark Robert M. Goddard Haynes C. Pricing for Water Supply: Its Impact on Systems Management. Envir. Health Effects Research Series, EPA -67011-74-001, National Envir. Res. Ctr., Office of Res. & Development, EPA, Cincinnati, Ohio 1974