JOON, Vidhi. ESD and GCED in Sikkim Textbooks: From the State—Sikkim. THE PRIMARY TEACHER, [S. l.], v. 44, n. 4, p. p.57–58, 2019. Disponível em: http://14.139.250.109:8090/index.php/tpt/article/view/1674. Acesso em: 8 jul. 2025.