1. MUS RP 6923 Reference (shelfmark): MUS RP 6923 Title: Scope & Content: Arnold Schoenberg. Typed letter signed to the composer Bernard van Dieren. Sotheby’s sale 25 May 2001 lot no.188. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 14 Jun 2001 Extent: 1 photocopy