“Generalized Class of Exponential Chain Ratio-cum-Chain Product Type Estimator for Finite Population Mean under Double Sampling Scheme in Presence of Non-Response” (2015) Global Journal of Science Frontier Research, 15(F7), pp. 23–35. Available at: https://www.journalofscience.org/index.php/GJSFR/article/view/1647 (Accessed: 14 August 2026).