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Leba MAU, Tukan MB, Komisia F. pH Indicator Paper by Immobilizing Turmeric Rhizome Ethanol Extract on Filter Paper. J. Sains Nat. [Internet]. 2022 Apr. 29 [cited 2026 Jul. 30];12(2):45-53. Available from: https://mail.ejournalunb.ac.id/JSN/article/view/377