History 538 Libraries 400 Books and reading 271 Academic libraries 156 Library science 151 Special collections 151 Books 145 more ... Bibliography 136 Public libraries 133 Publishers and publishing 119 Activity programs 111 Printing 103 School libraries 100 Administration 97 Book industries and trade 93 Conservation and restoration 90 Children's libraries 87 Librarians 85 Library materials 83 Information science 77 Censorship 76 Information technology 73 Digital libraries 71 Library administration 71 Information services 69 Management 68 Social aspects 68 Electronic information resources 65 Information literacy 65 Young adults' libraries 64 less ...