Sanjay Kumar (2015) “A Robust Regression Type Estimator for Estimating Population Mean under Non-Normality in the Presence of Non-Response”, Global Journal of Science Frontier Research, 15(F7), pp. 43–55. Available at: https://journalofscience.org/index.php/GJSFR/article/view/1649 (Accessed: 4 May 2024).