Nwachukwu, M., Duru, N., Ukaga, C., Nwachukwu, I., & Udujih, O. (2012). Bacteriological Evaluation of Water Bottles Used by Nursery School Pupils in Owerri, Nigeria. International Journal of Natural and Applied Sciences, 5(4). https://doi.org/10.4314/ijonas.v5i4.