Private bills 223,836 History 171,187 Electronic books 149,625 Biography 138,546 Periodicals 117,863 Legislative bills 111,979 Biographies 82,669 Statistics 82,277 Congresses 38,911 Fiction 34,963 Legislative hearings 34,661 Bibliography 33,032 Handbooks, manuals, etc 29,995 Conference papers and proceedings 29,302 Directories 24,495 Criticism, interpretation, etc 22,265 Legislative materials 21,496 Autobiographies 19,380 Sources 19,204 Case studies 18,868 Trials, litigation, etc 18,783 Maps 18,648 Catalogs 18,373 Drama 17,114 Exhibitions 16,862 Cases 16,654 Interviews 16,416 Government publications 16,339 Internet videos 16,197 Video recordings 14,693 Personal narratives 14,636 Pictorial works 14,500 Handbooks and manuals 14,178 Broadsides 13,739 Bibliographies 13,706 Feature films 13,112 Documentary films 12,748 Dictionaries 12,613 Exhibition catalogs 11,712 Rules and practice 11,332 Printed ephemera 11,326 Songs and music 10,956 Video recordings for the hearing impaired 10,681 Sound recordings 10,270 Poetry 10,139 Correspondence 9,611 Juvenile literature 9,604 Legislative histories 9,406 Speeches in Congress 8,812 Portraits 8,248 Educational films 7,862 Sermons 7,665 Music 7,359 Treaties 7,088 Rules 6,993 Nonfiction films 6,855 Academic theses 6,813 Specimens 6,523 In art 6,437 Juvenile works 6,004 Controversial literature 5,934 Early works to 1800 5,929 Print 5,920 DVD-Video discs 5,805 Architectural drawings 5,678 Poems 5,565 Diaries 5,508 Databases 5,308 Speeches 5,251 Designs and plans 5,128 Anecdotes 4,898 Comic books, strips, etc 4,715 Songs 4,665 Indexes 4,542 Records and correspondence 4,512 Zines 4,498 Casebooks (Law) 4,382 Television news programs 4,357 Congress 4,279 collective biographies 4,265 Novels 4,096 Messages 4,062 Guidebooks 4,038 Registers 3,995 Fiction films 3,984 Caricatures and cartoons 3,980 Comics (Graphic works) 3,972 Forms 3,905 Archives 3,886 Personal narratives, American 3,872 Illustrated works 3,845 Electronic journals 3,813 Personal correspondence 3,779 Radio news programs 3,737 Genealogy 3,703 Popular works 3,611 Census data 3,598 Congressional addresses 3,573 Compact discs 3,480 Study guides 3,460