Karo, Pulung Karo, Rio Orlando Pratama, and Roniyus Marjunus. “The Effect of Adding Corn Cob Ash to The Physical and Mechanical Properties of Mortar”. Journal of Energy, Material, and Instrumentation Technology 4, no. 1 (February 28, 2023): 19–26. Accessed October 13, 2025. http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/142.