1. Guidelines for Canadian Drinking Water Quality;Health and Welfare Canada,1978
2. National interim primary drinking water regulations;U.S. Environmental Protection Agency,1976
3. Public health consideration of the microbiology of “potable” water;Colwell,1978
4. Alternative indicators of water contamination and some physiological characteristics of heterotrophic bacteria in water;McFeters,1978
5. Evaluating mediums and plating techniques for enumerating bacteria in water distribution systems;Means;J. Am. Water Works Assoc.,1981