Publishers and publishing History 51 Booksellers and bookselling 32 Biography 28 Book industries and trade 26 Directories 21 Authorship 15 Authors and publishers 12 Printing 12 Bibliography 10 Books and reading 8 History and criticism 8 Periodicals 8 Newspaper publishing 7 Publishing 7 Correspondence 6 Books 5 Dictionaries 5 Congresses 4 Economic aspects 4 Editors 4 Libraries 4 Printers 4 Authors, English 3 English fiction 3 Handbooks, manuals, etc 3 Intellectual life 3 Marketing 3 Statistics 3 American periodicals 2