History 158 Periodicals 66 Societies, etc 25 Jews 15 Politics and government 11 History, Local 10 Constitutional history 6 more ... Sources 6 Emigration and immigration 5 Local history 5 Patriotic societies 5 Civilization 4 Industrial arts 4 Museums 4 Tools 4 American literature 3 Bibliography 3 Danes 3 Danish Americans 3 Editing 3 Genealogy 3 Historiography 3 Implements, utensils, etc 3 Manuscripts 3 Publishing 3 Railroads 3 African American college students 2 African American student movements 2 Battlefields 2 Conservation and restoration 2 Histoire 2 History and criticism 2 Labor movement 2 Military art and science 2 Minorities 2 Miscellanea 2 Norwegian Americans 2 Norwegians 2 Regimental histories 2 Social life and customs 2 less ...