“ECO CEMENT: INOVASI FORMULA SEMEN DENGAN SUBSTITUSI ABU JERAMI PADI, ABU CANGKANG KERANG SIMPING DAN ALBUMEN PADA PORTLAND CEMENT”. CRANE: Civil Engineering Research Journal, vol. 4, no. 1, Apr. 2023, pp. 29-40, https://doi.org/10.34010/crane.v4i1.9772.