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: https://ejournals.ncert.gov.in/index.php/tpt/article/view/1674. Acesso em: 7 jan. 2026.