Sharma S, Yadav S, Niwas R, Horo A, Pratap R. AN INVESTIGATION INTO THE CONCEPTUAL UNDERSTANDING OF STUDENTS ABOUT THE CONTENT OF EVS AT THE PRIMARY LEVEL. SS. 2014;52(2):p.28-42. Accessed August 23, 2025. http://ejournals.ncert.gov.in/index.php/SS/article/view/2173