OPERASI DISTILASI VAKUM TERHADAP RIMPANG KUNYIT SECARA KOHOBASI DAN UAP AIR UNTUK MENGHASILKAN MINYAK KUNYIT (Operating Vacuum Distillation of Turmeric Rhizome in Chohobation and Water Steam to Produce Turmeric Oil ) - Rohmanurrouf, Rohmanurrouf (2013)