Arya, A.K. and Pal, N. (2017) “Periodic Table as a Constructivist Model of Teaching-learning at the Secondary Level”, SCHOOL SCIENCE, 55(2-3), pp. p.88–92. Available at: http://14.139.250.109:8090/index.php/SS/article/view/2527 (Accessed: 28 April 2025).