sophian, A. (2022). Escherichia coli Bacteria Test on Polluted Meatballs With Several Variations of Positive Control Concentration: Escherichia coli Bacteria Test on Polluted Meatballs With Several Variations of Positive Control Concentration. BiosciED: Journal of Biological Science and Education, 3(1), 32–38. https://doi.org/10.37304/bed.v3i1.4908