Columbia subject headings:
Music trade--United States--History and criticism.
Music--United States--History and criticism.
Popular music--United States--History and criticism.
Harvard subject headings:
Music trade--United States--History and criticism.
Music trade--United States--History.
Music--United States--History and criticism
Popular music--United States--History and criticism
Princeton subject headings:
Music trade--United States--History and criticism.
Music--United States--History and criticism.
Popular music--United States--History and criticism.