Modifikasi feeder dan studi karakteristik pembakaran biomassa campuran ranting pohon dan cangkang kelapa pada fluidized bed combustor UI dengan kapasitas umpan maksimum = Feeder modification and study of combustion characteristic of mixture of tree branch and coconut sheel biomass at fluidized bed combustor ui with maximum feed capacity - Reynaldo B.T.Y., author (2010)