Private bills 223,836 History 171,175 Electronic books 155,795 Biography 138,652 Periodicals 117,876 Legislative bills 111,979 Biographies 82,672 Statistics 82,276 Congresses 38,916 Fiction 34,999 Legislative hearings 34,661 Bibliography 32,955 Handbooks, manuals, etc 30,000 Conference papers and proceedings 29,298 Directories 24,502 Criticism, interpretation, etc 22,264 Legislative materials 21,496 Autobiographies 19,376 Sources 19,219 Case studies 18,862 Trials, litigation, etc 18,783 Maps 18,655 Catalogs 18,380 Drama 17,116 Exhibitions 16,869 Cases 16,651 Interviews 16,414 Government publications 16,336 Internet videos 16,197 Video recordings 14,684 Personal narratives 14,665 Pictorial works 14,503 Handbooks and manuals 14,176 Broadsides 13,741 Bibliographies 13,705 Feature films 13,108 Documentary films 12,743 Dictionaries 12,616 Exhibition catalogs 11,729 Printed ephemera 11,342 Rules and practice 11,334 Songs and music 10,961 Video recordings for the hearing impaired 10,678 Sound recordings 10,268 Poetry 10,213 Correspondence 9,620 Juvenile literature 9,616 Legislative histories 9,406 Speeches in Congress 8,895 Portraits 8,257 Educational films 7,862 Sermons 7,787 Music 7,363 Treaties 7,094 Rules 6,993 Nonfiction films 6,854 Academic theses 6,812 Specimens 6,517 In art 6,437 Early works to 1800 6,154 Controversial literature 6,056 Juvenile works 6,003 Print 5,920 DVD-Video discs 5,804 Architectural drawings 5,678 Poems 5,567 Diaries 5,511 Databases 5,306 Speeches 5,250 Designs and plans 5,130 Anecdotes 4,909 Comic books, strips, etc 4,712 Songs 4,662 Indexes 4,543 Records and correspondence 4,514 Zines 4,488 Casebooks (Law) 4,381 Television news programs 4,357 Congress 4,277 collective biographies 4,276 Novels 4,095 Messages 4,063 Guidebooks 4,048 Registers 4,004 Fiction films 3,981 Caricatures and cartoons 3,979 Comics (Graphic works) 3,968 Forms 3,904 Archives 3,886 Personal narratives, American 3,870 Illustrated works 3,851 Electronic journals 3,813 Personal correspondence 3,780 Radio news programs 3,737 Genealogy 3,705 Popular works 3,609 Census data 3,597 Congressional addresses 3,573 Compact discs 3,480 Study guides 3,458