FORMULA OPTIMIZATION OF PLANTAGO (PLANTAGO MAJOR L.) HERB EXTRACT CHEWABLE TABLETS AT VARIOUS MANITOL- LACTOSE RATIO USING SIMPLEX LATTICE DESIGN - Hayati TN., Septi Nur; Balai Pengembangan Proses dan Teknologi Kimia (BPPTK)-LIPI Jln. Jogja-Wonosari km. 31 Yogyakarta 55861 (Pusbindiklat Peneliti - LIPI, 2011)