[1]
Purwoko, P., Romli, M., Suprihatin, S. and Haditjaroko, L. 2015. Alkaline Pretreatment of Sorghum Stalk and Co-Digestion with Sludge for Biogas Production. International Journal of Sciences: Basic and Applied Research (IJSBAR). 24, 1 (Jul. 2015), 15–23.