KIBU2022-03-092022-03-092021-02-05http://erepository.kibu.ac.ke/handle/123456789/4549REN 222:Material science IenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/REN 222:Material science IMaterial science IREN 222Other