Columbia subject headings:
Harvard subject headings:
African Americans--Music
Blues (Music)--1921-1930.
Blues (Music)--1931-1940
Music--United States
Popular music--1921-1930
Popular music--1931-1940
Princeton subject headings:
African Americans--Music.
Blues (Music)--1931-1940.
Blues (Music)--To 1931.
Music.
Popular music--1921-1930.
Popular music--1931-1940.