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Subject (Era)
- 20th century14
- Quaternary4
- 19th century3
- 1368-19122
- 19th cent2
- Qing dynasty, 1644-19122
- Tang dynasty, 618-9072
- 1644-19121
- 1800 - 18991
- 1890-19201
- 1900-19991
- 220-5891
- 960-16441
- Anthropocene1
- Cenozoic1
- Devonian1
- Han dynasty, 202 B.C.-220 A.D.1
- Ming dynasty, 1368-16441
- Ming-Qing dynasties, 1368-19121
- Song dynasty, 960-12791