00417nas a2200133   4500000000100000008004100001653005900042653004000101653002300141653001800164100001300182245007600195300001200271                                       d10aSDG 11: Sustainable Cities and Communities (ICH\_1389)10aSustainable development (THE\_7357)10aTourism (THE\_202)10aViet Nam (VN)1 aA. Galla00aHeritage and tourism in sustainable development: Ha Long Bay case study  a135-146