1. MUS RP 6989 Reference (shelfmark): MUS RP 6989 Title: Scope & Content: Arnold van Wyk. Autograph score and sketches of ‘Three Improvisations on Dutch Folksong’s’ for piano duet. Creation dates: Undated Collection Area: Music Collections Languages: Undetermined Date Range: 13 May 2003 Extent: 49 photocopies