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Alto Douro Tham khảoThực đơn
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Alto Alton F.C. Alto Douro Alton, Illinois Altolamprologus calvus Alton, Texas Alto Mijares Altolamprologus compressiceps Alto Rio Doce Alto HorizonteTài liệu tham khảo
WikiPedia: Alto Douro http://www.bestofdouro.com http://www.companhiaturisticadodouro.com/ http://www.wineanorak.com/douro2004_1.htm http://whc.unesco.org/en/list/1046 //tools.wmflabs.org/geohack/geohack.php?language=v... https://web.archive.org/web/20170502075406/http://... https://whc.unesco.org/archive/advisory_body_evalu... https://whc.unesco.org/en/list/1046