Simatupang, Ronald, Olga Pattipawaej, Tan Lie Ing, and Deni Setiawan. “Pengaruh Penggunaan Limbah Baja Terhadap Kuat Karakteristik Beton”. Jurnal Teknik Sipil 9, no. 1 (March 27, 2019): 75–83. Accessed May 3, 2024. https://journal.maranatha.edu/index.php/jts/article/view/1370.