Rosyidi, Moh Ririn, and Narto. “Study Experimental the Quality of Tombstones by Utilizing Coconut Fiber Using Seven Tools”. Spektrum Industri 20, no. 2 (October 9, 2022): 79–90. Accessed May 1, 2024. https://journal3.uad.ac.id/index.php/spektrum/article/view/74.