31400172[documents for musical works]PT2026-03-30 20:47:34BT31359309documents for oral or performed worksPTNT31429495librettosPTNT31429498scoresPTNT31429501sheet musicPTNT31429503songbooksPTNT31429509hymnalsPTNT31429511cue sheetsPTNT31359555music booksPTNT31429513song sheetsPTRT31333041musical notationPT