PENGARUH PENGGUNAAN MINYAK IKAN TERSULFIT TERHADAP NILAI KELEMASAN DAN KUALITAS KULIT IKAN PARI MONDOL (Himantura gerardi) TERSAMAK The Effect of Using Different Concentration of Sulfited Fish Oil on The Softness and Quality of Formalin Tanned Stingray (Himantura gerardi) Leather Download