हीरालाल, “शिक्षण साधन ओर बहुसंचार माध्यम ”, BAS, vol. 31, no. 04, pp. p. 81–89, Nov. 2024, Accessed: Aug. 16, 2025. [Online]. Available: http://ejournals.ncert.gov.in/index.php/bas/article/view/476