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		Payana, D., 		Widiyarta, I., & 		Sucipta, M.
2018 Nov 30.  Kekerasan Baja Karbon Sedang dengan Variasi  Suhu Permukaan Material. Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin. [Online] 4:2