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WikiPedia: Letusan_gunung_berapi_Krakatau_1883 http://www.bom.gov.au/tsunami/history/1883.shtml http://www.drgeorgepc.com/Tsunami1883Krakatoa.html http://www.geology.sdsu.edu/how_volcanoes_work/Kra... http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... //doi.org/10.1038%2F030010a0 //doi.org/10.1038%2F294699a0 http://www.npr.org/templates/story/story.php?story... //geohack.toolforge.org/geohack.php?pagename=Letus... http://www.scienceandsociety.co.uk/results.asp?ima... https://ui.adsabs.harvard.edu/abs/1884Natur..30......