KUALITAS MINYAK JAHE DARI PROSES DISTILASI KOHOBASI DAN DISTILASI UAP AIR AMPAS JAHE PADA TEKANAN VACUUM (The Ginger Oil Quality From Chohobation Distillation And Steam Distillation Process For Ginger Pulp On Vacuum Pressure) - YUANSARI, FRISCA BIANSHA (2012)