1. Add MS 35021, ff 20r-20v Reference (shelfmark): Add MS 35021, ff 20r-20v Title: J. S. Bach: ‘Prelude 23’ and ‘fuga a 4. 23.’ (Prelude and fugue in B major, BWV 892). Autograph. Collection Area: Music Collections Languages: Not applicable Date Range: [1739-1742] Extent: 1 folio
