“MANGROVE MONITORING USING NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI): CASE STUDY IN NORTH HALMAHERA, INDONESIA”. Jurnal Ilmu Dan Teknologi Kelautan Tropis, vol. 13, no. 2, Aug. 2021, pp. 219-3, https://doi.org/10.29244/jitkt.v13i2.34771.