AISHA MOHAMMED HAMZA; DR. DHEAA SHAMIKH ZAGEER. Natural Dyes as pH indicator: a review. AL-Yarmouk Journal, [S. l.], v. 21, n. 2, p. 22–29, 2026. Disponível em: https://journal.al-yarmok.edu.iq/index.php/alyj/article/view/1348. Acesso em: 29 jul. 2026.