This serie of releases are the definitive reference for exigent amateurs and completists (at least for the pre-Verve period).
Newcomers probably should start a bit easier with one of the decent compilations.
This specific disc covers the formative years, just before the A-Tisket, A-Tasket explosive buzz.
Included are two of the three cuts featuring the Mills Bros (last track of previous release containing the remainder one).
The Chronological Classics: Ella Fitzgerald 1937-1938 has no relationships.