Periodicals 1,046,589 Poetry 336,188 Pictorial works 269,143 Private bills 223,930 Personal narratives 96,802 Photographs 59,452 Parts (Music) 52,440 Poésie 51,746 Poems 50,448 Portraits 50,001 Periodical 49,896 Printed ephemera 48,609 Personal correspondence 45,109 Piano music 34,738 Popular music 32,437 Publishers' advertisements 29,450 Partitions (Musique) 27,838 Popular works 26,285 Print 25,910 Périodiques 25,611 Prayers and devotions 24,453 Posters 22,663 Périodiques 19,187 Parts 19,182 Problems, exercises, etc 17,756 Psychological fiction 17,742 Plays 17,118 Pamphlets 15,488 Problems and exercises 10,781 Prayers 10,685 Popular Work 9,228 Photobooks 8,863 Personal narratives, American 8,065 Parties (Musique) 7,181 Personal Narrative 6,937 Partitions 6,902 Playbills 6,743 Photomechanical prints 6,654 Personal narratives, Jewish 6,650 Personal narratives, French 6,237 Publishers' cloth bindings (Binding) 6,187 Prospectuses 5,918 Picture books 5,833 Personal narratives, British 5,554 Photographic prints 5,512 Pre-Linnean works 5,339 Pastoral letters and charges 5,334 Parodies, imitations, etc 5,315 Personal narratives, German 5,219 Printed wrappers (Binding) 5,151 Preludes (Music) 5,120 Personal narratives, Russian 4,986 Promotional materials 4,924 Photograph 4,863 Phonograph records 4,712 Political fiction 4,559 Part songs 4,492 Pictorial cloth bindings (Binding) 4,464 Prescriptions, formulae, receipts, etc 4,444 Poésie 4,082 Prayer-books and devotions 4,074 Piano scores 4,027 Paraphrases, English 3,974 Pictures 3,936 Pictorial maps 3,877 Piano music, Arranged 3,692 Popular Works 3,587 Paraphrases 3,581 Piano trios 3,511 Personal zines 3,482 Programs 3,355 Patents 3,354 Private press books (Printing) 3,334 Personal narratives, Italian 3,328 Promptbooks 3,227 Personal narratives, Polish 3,198 Physical maps 3,165 Printers' devices (Printing) 3,109 Playing cards 3,023 Picture books for children 2,970 Protest literature 2,949 Postcards 2,769 Photograph albums 2,652 Partitions et parties 2,608 Psalms (Music) 2,599 Photography, Artistic 2,582 Publishers' catalogs 2,555 Partitions de chant 2,539 Paranormal fiction 2,464 Personal narratives, Confederate 2,444 Personal narratives, Japanese 2,434 Portrait prints 2,329 Platforms 2,282 Programmed instruction 2,234 Poster 2,206 Prophecies 2,196 Poems (texts) 2,183 Patterns 2,164 Polish 2,057 Pencil drawings 2,015