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		Napitupulu, Richard A. M., 		Lumbantobing, Surianto, AND 		Manurung, Charles SP.
" Proses Pack Carburizing Baja Karbon Dengan Arang Kayu dan Arang Tulang Sapi" <em>Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin</em> [Online], Volume 9 Number 1 (12 May 2023)