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Muslim Raza SM, Butt MM. New Shewhart and EWMA Type Control Charts using Exponential Type Estimator with Two Auxiliary Variables under Two Phase Sampling. Pak.j.stat.oper.res. [Internet]. 2018Jun.1 [cited 2025Sep.1];14(2):367-86. Available from: https://pjsor.com/pjsor/article/view/1262