1. Standard Methods for the Examination of Water and Wastewater;Blacklow,1985
2. Water quality standards for surface waters;Arizona Department of State,1980
3. Virus gastroenteritis agents;Blacklow,1980
4. An outbreak of hepatitis A associated with recreational lake water;Bryan;Am. J. Epidemiol.,1974
5. Epidemiology of enteric viral infections;Cabelli,1981