Environmental assessment of river water quality near oil and gas fields by A.S. Patimah, A. Prasetya, S.H.M.B. Santosa

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Titanium Dioxide Production from Low-Grade Ilmenite Ore: Mineral Characterization and Optimization by Y.I. Supriyatna, W. Astuti, S. Sumardi, A. Prasetya, L.I. Br. Ginting, W. Wahab, H.T.B. Murti Petrus

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