BUTAR BUTAR, A.; IKHSAN, A.; RAZAK, A.; HANDAYUNI, L.; YUNIARTI, E. Identification of Hazardous and Toxic Waste Characterization in the Mining Activities of PT Semen Padang. Science and Environmental Journal for Postgraduate, v. 5, n. 2, p. 105-110, 12 jun. 2023.