“SUBSTITUTION OF ACID AND REACTIVE DYESTUFF MATERIALS IN THE WET BLUE SHEEP SKIN DYEING METHOD FOR NAPA LEATHER AND SUEDE GARMENTS ON WATER WASHING RESISTANCE AS A LABORATORY MANAGEMENT EFFORTS” (2025) Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit, 24(1), pp. 22–28. doi:10.58533/p9ck7k13.