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Ulos Batak Natural Dye Paste from Salaon Leaf Extract (Indigofera Tinctoria L), Ketapang Leaf (Terminalia catappa), and Cocoa Fruit Peel (Theobroma Cacao L). J.Pendidik.Kim 2023, 15 (1), 29-34. https://doi.org/10.24114/jpkim.v15i1.38358.