Bibliography 16,331 History 6,675 Libraries 4,134 Catalogs 2,291 Periodicals 2,006 Books 1,776 Library science 1,768 more ... Books and reading 1,756 Printing 1,622 Academic libraries 1,283 Publishers and publishing 1,231 History and criticism 1,057 Manuscripts 1,055 Information storage and retrieval systems 967 Public libraries 947 Information services 932 Automation 883 Imprints 794 School libraries 793 Indexes 790 Sources 778 Book industries and trade 758 Children's literature 740 Congresses 733 Directories 691 Information science 644 Study and teaching 624 Rare books 595 Research 588 Reference books 586 less ...