rianti, suratniaf. “MODEL SEBARAN TINGKAT PENCEMARAN LOGAM BERAT MENGGUNAKAN GEOGRAPHIC INFORMASI SITEM (GIS) DAERAH ALIRAN SUNGAI DELI SUMATERA UTARA”. Agroprimatech 3, no. 2 (January 22, 2020): 1–10. Accessed December 8, 2025. https://jurnal.unprimdn.ac.id/index.php/Agroprimatech/article/view/818.