Arifin, Arifin, Ayu Karlina, and Abdul Khair. 2017. “The Effect of Chitosan Dosage Againts Liquid Waste Water Color on ‘Oriens Handicraft’ Sasirangan Home Industry, Landasan Ulin”. Journal of Health Science and Prevention 1 (2):58-67. https://doi.org/10.29080/jhsp.v1i2.91.