Nusantoro, Agung, and Nur Fadhilah Ramadhani. “Pengaruh Abu Tulang Sapi Terhadap Kenaikan Kuat Tekan Beton”. Surya Beton : Jurnal Ilmu Teknik Sipil 5, no. 1 (March 31, 2021): 20-27. Accessed November 23, 2024. https://ebook.umpwr.ac.id/index.php/suryabeton/article/view/1105.