HILMA, R.; AKBAR, U.; PRASETYA, -. OPTIMUM CONDITION OF BIOETANOL PRODUCTION VIA ACIDIC HYDROLYSIS FROM PINEAPLE (Ananas comosus Merr.) PEEL WASTE IN KUALU VILLAGE-KAMPAR. Photon: Jurnal Sain dan Kesehatan, v. 7, n. 02, p. 135-142, 20 May 1930.