History 123 Periodicals 92 Societies, etc 68 Railroads 49 Genealogy 44 Directories 40 Congresses 33 more ... Slavery 29 Antislavery movements 22 Almanacs, American 19 Politics and government 18 Sources 18 Bibliography 16 Charities 15 Finance 15 Biography 13 Labor unions 12 Employees 11 Jews 11 African Americans 10 Emigration and immigration 10 Patriotic societies 9 Regimental histories 9 Catalogs 8 Clothing trade 8 Slovak Americans 8 Statistics 8 Women 8 Clothing workers 7 Education 7 Emigration and immigration law 7 History, Local 7 Public welfare 7 Registers 7 Salaries, pensions, etc 7 Almanacs, Slovak 6 Archives 6 Freed persons 6 Social conditions 6 directories 6 less ...