Suprapto SJ. Geokimia regional Sulawesi bagian Utara percontoh endapan sungai aktif -80 mesh. Indonesian J. Geosci. [Internet]. 2006 Jun. 28 [cited 2025 Jun. 7];1(2):73-82. Available from: https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/10