@article{ijtech-5131, title={Preparation and Characterization of Sound-Absorbent Based on Polystyrene Reinforced Primary Sludge and Fly Ash from Pulp Mill}, author={Tengku Rachmi Hiadayani,Basuki Wirjosentono,Darwin Yunus Nasution, Tamrin}, volume={14}, number={3}, year={2023}, month={May}, pages={649-658}, DOI={https://doi.org/10.14716/ijtech.v14i3.5131}, journal={International Journal of Technology}, ISSN={2087-2100}}