Metboki, T., Rika Ernawati, & Nurkhamim. (2019). Analysis of Heavy Metal Content in the Manganese Washing Tailings of PT. Anugerah Nusantara Sejahtera in Timor Tengah Utara Regency, East Nusa Tenggara Province. ReTII, 54-58. Retrieved from //journal.itny.ac.id/index.php/ReTII/article/view/1459