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Thinking ahead : Unesco and the challenges of today and tomorrow.
- 341.767 U567t
- Unesco.
- UNESCO,
- 1977.
- Paris :
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World heritage 2007-08 [cartographic material] / UNESCO ; design and production by National Geographic Maps.
- 363.69 U567
- Unesco.
- UNESCO. World Heritage Centre,
- 2007.
- [Paris] :