Janchaiyaphoom, H. and 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. Phitsanulok, Thailand, 8(3), pp. 69–81. Available at: https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/253525 (Accessed: 15 May 2024).