Studying the Influence of Cobalt Chloride on the Optical Properties of Poly (vinyl alcohol) Films. Al-Nahrain Journal of Science, [S. l.], v. 15, n. 1, p. 40–45, 2018. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/1543.. Acesso em: 2 may. 2024.