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Rani, Iskandar .G and Salmita, Widya (2017) Improvement of Conctere Quality with Addition of Sunua Pasir Padang Pariaman West Sumatera. In: 4th International Conference on Technical and Vocation Education and Training (TVET): Technical and Vocational Education and Training for Sustainable Societies, 9-11 November 2017, Padang.