Kuryanto, Totok Dwi, Irawati Irawati, and Nanang Saiful Rizal. 2018. “The Use of Vibra Engine to Enhance Batako Industrial Quality at Urban Area”. Kontribusia : Research Dissemination for Community Development 1 (1):7-11. https://doi.org/10.30587/kontribusia.v1i1.250.