UNSCHEDULED DNA SYNTHESIS INDUCED IN CULTURES HUMAN HEPATOCYTES BY CONCENTRATES OF DRINKING POND WATER COLLECTED FROM THE HIGH INCIDENCE AREA OF L IVER CANCER Carcinogenesis, Teratogenesis & Mutagenesis . 1997, (2): 90 -92 .  DOI: 10.3969/j.issn.1004-616x.1997.02.005