Janchaiyaphoom, H., & Theakthum, S. . (2023). DEVELOPMENT OF THE NATURAL RUBBER SPONGE MIXED PASSION FRUIT PEEL CHARCOAL POWDER TO PRODUCE CUSHIONS USING DESIGN OF EXPERIMENT. PSRU Journal of Science and Technology, 8(3), 69–81. Retrieved from https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/253525