Places
- China -- History -- Revolution, 19131
- China -- History -- Revolution, 1915-19161
- China -- History -- Warlord period, 1916-19281
- China -- History, Military2
- China -- History, Military -- 1912-19491
- China -- Intellectual life -- 20th century1
- China -- Pictorial works1
- China -- Politics and government1
- China -- Politics and government -- 1912-19494
- China -- Politics and government -- 20th century2
- China -- Relations -- Soviet Union1
- Czechoslovakia -- Foreign relations -- 1945-19921
- Czechoslovakia -- History -- 1938-19451
- Emigration and immigration -- Iran -- 20th century1
- Estonia -- History1
- Estonia -- History -- Revolution, 1917-19181
- Europe -- Description and travel1
- Europe -- Emigration and immigration1
- Europe, Eastern1
- Europe, Eastern -- Politics and government -- 1945-19891