1. MUS RP 4947 Reference (shelfmark): MUS RP 4947 Title: Scope & Content: BEETHOVEN, Ludwig van. Autograph Manuscript of Piano Sonata in E minor OP 90, signed. Sotheby's, 6 Dec 1991, Lot 52 Creation dates: 16 Aug 1814 Collection Area: Music Collections Languages: Undetermined Date Range: 19 Mar 1992 Extent: 28 black and white prints