Wahyoto, Nur Endah Wahyuningsih, and Nurjazuli, “Relationship of Heavy Metal levels (Pb and Cd) on Leachate Jatibarang Waste and Water River end Disposal place raw materials Municipal Waterworks Semarang City”, Int. j. res. inf. sci. appl. tech., vol. 3, no. 3, pp. 8–14, Mar. 2019.