The textbook, its concept and educational importance. Journal of the College of Basic Education, [S. l.], v. 28, n. 117, p. 357–371, 2022. DOI: 10.35950/cbej.v28i117.8567. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/8567.. Acesso em: 5 jul. 2024.