Syaifudin, Syaifudin, et al. “Corn Transformation Machine As Media Increases Threshing Productivity of Corn Village Prupuh, Panceng Sub - District, Gresik Regency”. Kontribusia : Research Dissemination for Community Development, vol. 2, no. 2, Sept. 2019, pp. 28-33, doi:10.30587/kontribusia.v2i2.1006.