1. MUS RP 7015 Reference (shelfmark): MUS RP 7015 Title: Scope & Content: Johann Christoph Friedrich Bach. Autograph letter signed to the publisher Breitkopf in Leipzig. Sotheby’s sale 05 Dec 2003 lot no.10. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 10 Jan 2004 Extent: 1 photocopy