1. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1989
2. The lactose operon;Beckwith,1987
3. Validity of fecal coliforms, total coliforms, and fecal streptococci as indicators of viruses in chlorinated primary sewage effluents;Berg;Appl. Environ. Microbiol.,1978
4. Introduction to Environmental Virology;Bitton,1980
5. Viruses in drinking water;Committee Report;J. Am. Water Works Assoc.,1981