“THE EFFECT OF RECYCLED POLYPROPYLENE AND CALCIUM CARBONATE ADDITION ON MECHANICAL PROPERTIES OF POLYPROPYLENE YARN”. Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit 23, no. 1 (December 16, 2024): 126–134. Accessed December 22, 2024. https://e-jurnal.atk.ac.id/index.php/bptkspk/article/view/36.