1McCann B. [ J]. Water Quality Intern, 1999,4-5:4.
2Payment T, et al. [J]. J Environ Health, 1997,(7) :5-31 .
3Westrell T. [J]. Environ Health Res, 2003, 13(6) : 181-197.
4Havelar AH. [J]. Food Control, 1994,5: 145-152.
5Deere DA, Davison A D. [ J ]. Water, 1998,11/12 :21-24.
6Barry S J, et al. Developing and Implementing a HACCP-Based Programme to Control Cryptosporidimn and Other Waterborne Pathogens in the Alameda Creek Watershed: Case Study[ R]. Dallas, Texas: American Water Works Association Annual Conference, 1998.21-25.
