1. JBA2.11 Reference (shelfmark): JBA2.11 Title: Fifty Years of Bird Sound Recording Scope & Content: Copies of 'Fifty Years of Bird Sound Publication in North America: 1931-1981' by Jeffery Boswall and Dominic Couzens (1982) and related material. Collection Area: Sound Archive Languages: English Date Range: 1982 Extent: 1 folder and 18 loose items