Singh, Housila P., Surya Kant Pal, and Ramkrishna S. Solanki. 2014. “A NEW PROCEDURE FOR ESTIMATION OF FINITE POPULATION VARIANCE USING AUXILIARY INFORMATION”. Journal of Reliability and Statistical Studies 7 (02):149-60. https://journals.riverpublishers.com/index.php/JRSS/article/view/21165.