LAJU PRODUKSI MINYAK JAHE DARI RIMPANG JAHE SECARA KOHOBASI DAN DISTILASI UAP-AIR PADA TEKANAN VAKUM (The Production Rate of Ginger Oil from Ginger Rhizome with Chohobation Distillation Process and Steam-Water Distillation on Vacuum Pressure) - RACHMATIKA, LAILI (2012)