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WikiPedia: Davao_del_Sur http://www.davaotraveler.com/ http://www.edavao.com http://www.theMindanao.com //tools.wmflabs.org/geohack/geohack.php?language=v... http://r11.pia.gov.ph/index.php?article=1561383119... https://web.archive.org/web/20131203033933/http://...