The Effect of Boiled LDPE (Low Density Poly Ethylene) Plastic on GPTS (Glutamic Pyruvic Transaminase in Serum) Level Total Bilirubin and Hepatocytes of Rats (Rattus norvegicus Berkenhout, 1769) - Mulyati, Sarto (Faculty of Medicine Universitas Gadjah Mada, 2011)