| LC control no. | sh 85139020 |
|---|---|
| LC classification | CB425 Civilization D401 D725 History |
| Topical heading | Twentieth century |
| Variant(s) | 1900s (Century) 20th century Nineteen hundreds (Century) |
| See also | subdivision History--20th century under names of countries, cities, etc., individual corporate bodies, and under classes of persons, ethnic groups, and topical headings |
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