Periodicals 1,046,467 Poetry 336,259 Pictorial works 269,089 Private bills 223,930 Personal narratives 96,823 Photographs 59,464 Parts (Music) 52,410 Poésie 51,738 Poems 50,434 Portraits 50,005 Periodical 49,866 Printed ephemera 48,610 Personal correspondence 45,108 Piano music 34,737 Popular music 32,435 Publishers' advertisements 29,428 Partitions (Musique) 28,296 Popular works 26,281 Print 25,910 Périodiques 25,584 Prayers and devotions 24,449 Posters 22,663 Parts 19,175 Périodiques 19,125 Problems, exercises, etc 17,754 Psychological fiction 17,733 Plays 17,117 Pamphlets 15,489 Problems and exercises 10,785 Prayers 10,686 Popular Work 9,236 Photobooks 8,861 Personal narratives, American 8,061 Parties (Musique) 7,267 Personal Narrative 6,933 Partitions 6,875 Playbills 6,743 Photomechanical prints 6,654 Personal narratives, Jewish 6,650 Personal narratives, French 6,237 Publishers' cloth bindings (Binding) 6,185 Prospectuses 5,917 Picture books 5,826 Personal narratives, British 5,555 Photographic prints 5,512 Pre-Linnean works 5,342 Pastoral letters and charges 5,335 Parodies, imitations, etc 5,316 Personal narratives, German 5,221 Printed wrappers (Binding) 5,154 Preludes (Music) 5,118 Personal narratives, Russian 4,986 Promotional materials 4,922 Photograph 4,863 Phonograph records 4,712 Political fiction 4,558 Part songs 4,491 Prescriptions, formulae, receipts, etc 4,477 Pictorial cloth bindings (Binding) 4,463 Prayer-books and devotions 4,074 Poésie 4,061 Piano scores 4,028 Paraphrases, English 3,974 Pictures 3,937 Pictorial maps 3,877 Piano music, Arranged 3,692 Paraphrases 3,582 Popular Works 3,581 Piano trios 3,511 Personal zines 3,479 Patents 3,354 Programs 3,354 Personal narratives, Italian 3,328 Private press books (Printing) 3,322 Promptbooks 3,226 Personal narratives, Polish 3,198 Physical maps 3,166 Printers' devices (Printing) 3,108 Playing cards 3,015 Picture books for children 2,969 Protest literature 2,949 Postcards 2,769 Photograph albums 2,652 Partitions de chant 2,618 Psalms (Music) 2,602 Partitions et parties 2,598 Photography, Artistic 2,586 Publishers' catalogs 2,554 Paranormal fiction 2,462 Personal narratives, Confederate 2,445 Personal narratives, Japanese 2,433 Portrait prints 2,329 Platforms 2,282 Programmed instruction 2,234 Poster 2,206 Prophecies 2,198 Poems (texts) 2,182 Patterns 2,164 Polish 2,057 Pencil drawings 2,015