Adu, Risna Erni Yati, et al. “Eco-Dyeing of Timor Woven Fabrics Using Pterocarpus Indicus Bark Tannin As a Natural Mordant”. Hydrogen: Jurnal Kependidikan Kimia, vol. 12, no. 4, Aug. 2024, pp. 772-8, doi:10.33394/hjkk.v12i4.11640.