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Masturi, M., Alighiri, D., Choirunnisa, F. and Kirana, K.G.C. 2023. HIGH STRENGTH MANGO LEAF WASTE/POLYURETHANE COMPOSITE REINFORCEMENT USING QUARTZ MATERIAL. Spektra: Jurnal Fisika dan Aplikasinya. 8, 1 (Apr. 2023), 55 - 64. DOI:https://doi.org/10.21009/SPEKTRA.081.05.