4Zieta B P,Nordholt G,Ketseridis G,et al,2001.Mutagenicity of Baltic seawater and the relation to certain chemical and microbiological parameters.Mar Pollut Bull,42:845-851.
5Wu J Y,Shen L,Gao G,et al,2004.A seasondependent variation of genotoxicity of surface water samples from Taihu Lake,Yangzte Delta.Environ Monitoring and Assessment,98:225-234.
6Marion D M,Ames B N,1983.Revised methods for the Salmonella mutagenicity test.Mut Res,113:173-215.
7Bernstein L,Kaldor J,McCann J,et al.1982.An empiricl approach to the statistical analysis of mutagenesis data from the Salmonella test.Mut Res,97:267-281.
