Estonia Estland 145 History 88 Biography 35 Geschichte 23 20th century 21 Politics and government 21 Tallinn 14 19th century 13 1940-1991 12 Social life and customs 11 Sources 11 Folklore 10 1918-1940 9 1991- 9 Autonomy and independence movements 9 World War, 1939-1945 9 Civilization 8 Estonian language 8 Intellectual life 8 Tartu 8 Estonians 7 Foreign relations 7 Pictorial works 7 Saaremaa Island 7 Bibliography 6 Education 6 Kultur 6 Russland 6 Congresses 5