Sagala, Sophia L, Rikha Bramawanto, KuswardaniAnastasia R.T.D, and Widodo S Pranowo. 2015. “DISTRIBUTION OF HEAVY METALS IN NATUNA COASTAL WATERS”. Jurnal Ilmu Dan Teknologi Kelautan Tropis 6 (2). https://doi.org/10.29244/jitkt.v6i2.9008.