Coal desulfurization by flotation method by Nurhawaisyah, S R, Jafar, N, Bakri, S, Widodo, S

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Mineralogical Study of Bauxite of Kenco Area, Landak District, West Kalimantan Province, Indonesia by Jafar, N, Nurhawaisyah, S R, Widodo, S, Chalik, C A, Wakila, M H

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A petrographic study of bauxite of Kenco area, Landak District, West Kalimantan Province by Nurhawaisyah, S R, Jafar, N, Bakri, S, Artiningsih, A, Widodo, S

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The effect of raw material composition of mixed carbonized canary shell and coal bio briquettes on caloric value by Widodo, S, Asmiani, N, Jafar, N, Artiningsih, A, Nurhawaisyah, S R, Harwan, Chalik, C A, Thamrin, M., Husain, J R

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Screening of bacteria for coal beneficiation by Nurhawaisyah, S R, Sanwani, E, Chaerun, S K, Rasyid, M A

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Clean coal technology using an iron- and sulfur-oxidizing mixotrophic bacterium by Nurhawaisyah, S R, Sanwani, E, Chaerun, S K, Rasyid, M A

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