AGARWAL, Reena. Acquisition of Concept of Conservation of Length in Elementary School Children through Piagetian Teaching Model. JOURNAL OF INDIAN EDUCATION, [S. l.], v. 35, n. 2, p. p.83–96, 2009. Disponível em: http://14.139.250.109:8090/index.php/jie/article/view/348. Acesso em: 28 apr. 2025.