Relationships among coliphage fecal coliforms, enterovirus and salmonella levels in raw water of the greater São Paulo, Brazil - Martins, Maria Therezinha; Pellizari, Vivian Helena; Sanchez, Petra Sanchez; Marques, E.; Dal Colletto, Gloria Maria D; Irino, K (International Symposium on Microbial Ecology (Isme 5), 1989)