The subject "Louis Armstrong: The Complete Decca Studio Recordings"
This collection is considered essential for jazz historians because it bridges the gap between Armstrong's revolutionary 1920s "Hot Five" recordings and his later "Hello, Dolly" pop era. It features his most secure vocal work and a brilliance of tone that influenced generations of trumpeters. The Complete Louis Armstrong Decca Sessions 1935-46 The subject "Louis Armstrong: The Complete Decca Studio
If you already have a copy and want to check its integrity: "Heebie Jeebies" (rewriting scat singing)