D. B. . Singh and D. J. . Singh, “Factors Affecting Learning Outcomes at the Elementary School Level”, TPT, vol. 37, no. 1-2, pp. p.48–76, Jan. 2012, Accessed: Aug. 18, 2025. [Online]. Available: http://ejournals.ncert.gov.in/index.php/tpt/article/view/826