SUBHASH KUMAR YADAV; HIMANSHU PANDEY. A Ratio-cum-Dual to Ratio Estimator of Population Variance Using Qualitative Auxiliary Information Under Simple Random Sampling. Mathematical Journal of Interdisciplinary Sciences, [S. l.], v. 1, n. 2, p. 91–96, 2013. DOI: 10.15415/mjis.2013.12016. Disponível em: https://mjis.chitkara.edu.in/index.php/mjis/article/view/152. Acesso em: 29 apr. 2024.