A. M. MUSYOKI, M. . A. SULEIMAN, J. . N. MBITHI, and J. . M. MAINGI, “WATER-BORNE BACTERIAL PATHOGENS IN SURFACE WATERS OF NAIROBI RIVER AND HEALTH IMPLICATION TO COMMUNITIES DOWNSTREAM ATHI RIVER: Life Science-Environmental microbiology ”, Int J Life Sci Pharm Res, vol. 3, no. 1, pp. L4-L10, Mar. 2012.