Directories 43 History 32 Societies, etc 32 Genealogy 17 Archival resources 15 Library resources 10 Archives 8 more ... Information services 8 Universities and colleges 8 Associations, institutions, etc 7 Minorities 7 Railroads 7 Societies 7 Sources 7 Associations 6 Courts 6 Endowments 6 Histoire 6 Jews 6 Lawyers 6 Répertoires 6 directories 6 African Americans 5 Art 5 Fonds d'archives 5 Genealogists 5 Historic sites 5 Hotels, taverns, etc 5 Libraries 5 Officials and employees 5 Physicians 5 Bibliography 4 Ethnic relations 4 Executive departments 4 Foundations 4 German Americans 4 Germans 4 Labor unions 4 Law and legislation 4 Museums 4 less ...