Kusuma, Ratih Chandra. “Kajian Kandungan Logam Berat Di Lokasi Penambangan Emas Tradisional Di Desa Sangon, Kecamatan Kokap, Kabupaten Kulon Progo”. ReTII (March 21, 2018). Accessed July 3, 2024. //journal.itny.ac.id/index.php/ReTII/article/view/714.