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- http://vocabularies.unesco.org/thesaurus/concept1937 1
- http://vocabularies.unesco.org/thesaurus/concept1938 1
- http://vocabularies.unesco.org/thesaurus/concept1939 1
- http://vocabularies.unesco.org/thesaurus/concept1940 1
- http://vocabularies.unesco.org/thesaurus/concept1941 1
- http://vocabularies.unesco.org/thesaurus/concept1942 1
- http://vocabularies.unesco.org/thesaurus/concept1943 1
- http://vocabularies.unesco.org/thesaurus/concept1944 1
- http://vocabularies.unesco.org/thesaurus/concept1945 1
- http://vocabularies.unesco.org/thesaurus/concept1946 1
- http://vocabularies.unesco.org/thesaurus/concept1947 1
- http://vocabularies.unesco.org/thesaurus/concept1948 1
- http://vocabularies.unesco.org/thesaurus/concept1949 1
- http://vocabularies.unesco.org/thesaurus/concept195 10
- http://vocabularies.unesco.org/thesaurus/concept1950 2
- http://vocabularies.unesco.org/thesaurus/concept1951 1
- http://vocabularies.unesco.org/thesaurus/concept1952 1
- http://vocabularies.unesco.org/thesaurus/concept1953 1
- http://vocabularies.unesco.org/thesaurus/concept1954 1
- http://vocabularies.unesco.org/thesaurus/concept1955 1