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| Category:20th century by country |
| Modification date "Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
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09:30:15, 18 May 2016 + |
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| Subcategory of | 20th century + , Centuries by country + , Modern history by country + |
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| Category:20th century in France + , Category:20th century in Switzerland + , Category:20th century in the United States + | Subcategory of |
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