Sumarno A, Syafwandi S, Rizky F, Sumiyati S. Comparation Study of the Use Naftalena from Coal Tar Waste with Camper Napthtalene as Concrete Admixture. IJTI [nternet]. 2020Jul.15 [cited 2024May5];3(2):99-108. vailable from: https://jurnal.narotama.ac.id/index.php/ijti/article/view/1061