Didik, Purwantoro and Ing. Satoto, E. Nayono, Dr., M.Eng., M.Sc. and Retna, Hidayah, S.T., M.T., Ph.D. (2012) ANAEROBIC TREATMENT OF SEPTIC TANKS’ SLUDGE WITHIN THE FRAME OF INTEGRATED WATER RESOURCE MANAGEMENT. [Experiment/Research]