Gultom, Fransiskus, & Hernawaty Hernawaty. " THE EFFECT OF SARULLA NATURAL NANOZEOLITE ADDITION IN THE PREPARATION OF NANOCOMPOSITE FOAM POLYURETHANTSVIEWED FROM FTIR CHARACTERIZATION." Jurnal Darma Agung [Online], 28.3 (2020): 507-524. Web. 22 Dec. 2024