Mwangi, Ian, et al. “Determining the Presence of Escherichia Coli and Salmonella Sp. As Indicator Organisms of Contamination from Fresh Produce Sold in Open-Air Markets in Juja”. Journal of Physical and Applied Sciences (JPAS), vol. 5, no. 1, June 2026, pp. 1-22, doi:10.51317/jpas.v4i1.691.