Archives Sources 88 History 79 Indexes 32 Bibliography 31 Catalogs 25 Public records 9 Libraries 8 Congresses 7 Handbooks, manuals, etc 7 Administration 6 Foreign relations 6 Manuscripts 6 Politics and government 6 World War, 1939-1945 6 Correspondence 5 Directories 5 Library science 5 Management 5 Archival resources 4 Data processing 4 Information services 4 Letters patent 4 Periodicals 4 Universities and colleges 4 Colonies 3 Conservation and restoration 3 Equity 3 Historiography 3 Records 3