2024. THE EFFECT OF COMBINATION VEGETABLE TANNING MATERIALS AND SULPHITED OIL ON THE PHYSICAL PROPERTIES OF JACKET LEATHER . Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit . 21, 2 (Dec. 2024), 297–207. DOI:https://doi.org/10.58533/rhvpj273.