Yater Tato, and B.K. Singh. “Generalized Class of Exponential Chain Ratio-Cum-Chain Product Type Estimator for Finite Population Mean under Double Sampling Scheme in Presence of Non-Response”. Global Journal of Science Frontier Research 15, no. F7 (May 15, 2015): 23–35. Accessed May 6, 2024. https://journalofscience.org/index.php/GJSFR/article/view/1647.