Sohif, Hajar Naemah, et al. “Experimental Investigation on Surface Roughness, Hardness and Tensile Strength of Rice Husk (RH) As a Filler for Formulation of Polethylene-Terephthalate Glycol (PETG) 3D Filament Title of Manuscript”. Semarak International Journal of Material Research, vol. 2, no. 1, Mar. 2025, pp. 1-11, doi:10.37934/sijmr.2.1.111a.