Evi Triwulandari, Agus Haryono, & Wiwik Pudjiastuti. (2011). EFFECT OF NCO/OH RATIO AND MOLD SYSTEM ON PHYSICAL AND MECHANICAL PROPERTIES OF RIGID POLYURETHANE FOAM BASED ON PALM OIL. Jurnal Sains Materi Indonesia, 12(2), 96–100. https://doi.org/10.17146/jsmi.2011.12.2.4593