Ismaila, O Adegbite, Joseph O Braimah, Adedotun O Omisore, and Liasu A Ayinde. 2019. “ON THE USE OF POOLED SHEWHART-CUSUM CONTROL CHART FOR MONITORING PROCESS MEAN USING SAMPLING METHODS”. Academic Journal of Current Research 6 (10):32-39. https://cirdjournals.com/index.php/ajcr/article/view/494.