Periodicals 126 History 62 Encyclopedias and dictionaries 58 Museums 42 Meetings 39 Directories 37 Humanities 36 more ... Handbooks, manuals, etc 31 Curiosities and wonders 30 Congresses and conventions 25 Literature 25 Learned institutions and societies 21 Associations, institutions, etc 19 Investments 19 Nobel prizes 19 Social sciences 19 History and criticism 18 Learning and scholarship 18 Science 16 Biography 15 Museum techniques 15 Current events 14 Indexes 14 Property 14 Chinese literature 13 Research 12 World politics 12 World records 12 Educational aspects 11 Politics and government 11 less ...