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Subject (Era)
- 20th century7,129
- Revolution, 1917-19216,062
- 1917-19362,876
- 1985-19911,910
- 1917-19451,736
- 1953-19851,355
- 1945-19911,165
- 1917-1,136
- 1936-1953987
- 1945-866
- 19th century862
- 1991-818
- 1925-1953755
- 1945-1989633
- 1801-1917610
- 1917-1928570
- 1975-1985460
- 1939-1945448
- 1894-1917432
- German occupation, 1941-1944416