Elhusna E, Afrizal Y, Sofia H. MORTAR SEMEN ABU DAUN PINUS DAN ABU BATA MERAH. IJTS [Internet]. 2019 Sep. 14 [cited 2024 May 2];11(1):41-8. Available from: https://ejournal.unib.ac.id/inersiajurnal/article/view/8692