20th century Historia wyszukiwania 163 Biography 93 Lithuania 78 History and criticism 54 Latvia 53 Litauen 51 Lettland 46 Intellectual life 39 Estonia 33 Estland 32 Lettisch 29 Politics and government 29 Authors, Latvian 28 Literatur 27 Geschichte 26 Litauisch 24 World War, 1939-1945 24 19th century 20 Vilnius 20 Latvian literature 16 Lithuanian literature 16 Ethnic relations 15 Civilization 14 Foreign relations 14 Jews 14 Baltikum 13 Authors, Lithuanian 12 Authors, Estonian 11 Baltic States 11