1. National Interim Primary Drinking Water Regulations Washington, D.C. 1976
2. National Revised Primary Drinking Water Regulations, Advanced Notice of Proposed Rulemaking;Fed. Reg.,1983
3. Pipes , W.O. Monitoring of Microbial Water Quality Assessment of Microbiology and Turbidity Standards for Drinking Water P.S. Berger Y. Argaman Washington, D. C. 1983
4. Frequency Distributions of Coliforms in Water Distribution Systems;Christian;Appl. Envir. Microbiol.,1983
5. Bacterial Density in Water Determined by Poisson and Negative Binomial Distributions;El Shaarawi;Appl. Envir. Microbiol.,1981