Himawan, H., Taufiq, U. A., Setiawan, R., ., M., ., S., & Dwijananti, P. (2019). Calcium Sulfate Dihydrate (gypsum) Quality Test Using Radiography Non Destructive Test (RNDT) . KnE Social Sciences, 3(18), 656–662. https://doi.org/10.18502/kss.v3i18.4756