Nwachukwu, MI, NC Duru, CN Ukaga, IO Nwachukwu, and OS Udujih. 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.