1. LKA11 Reference (shelfmark): LKA11 Title: German Service broadcasts Scope & Content: Some undated documents Collection Area: Sound Archive Languages: English and German Date Range: 1936-1953 Extent: 154 folios
2. LKA11.3 Reference (shelfmark): LKA11.3 Title: Birdsong as a musical inspiration Scope & Content: Draft scripts and correspondence Collection Area: Sound Archive Languages: English Date Range: 1945-1953 Extent: 24 folios
3. LKA11.4 Reference (shelfmark): LKA11.4 Title: Notes on bird species and Koch's recordings of them Scope & Content: Notes and typed drafts [English]. Undated document(s) Collection Area: Sound Archive Languages: English Date Range: Mid 20th century Extent: 41 folios