History 22 Description and travel 5 Politics and government 5 Socialism 5 Civilization 4 Congresses 4 Economic conditions 4 History and criticism 3 Spanish literature 3 Bibliography 2 Communism 2 Foreign relations 2 Intellectual life 2 Public opinion 2 Social conditions 2 Teachers 2 Trade-unions 2 Working class 2 Analysis 1 Anarchism 1 Architecture, Gothic 1 Automobile travel 1 Case studies 1 Catalogs 1 Christian art and symbolism 1 Church architecture 1 Collectivism 1 Colonias 1 Colonies 1 Commerce 1