Columbia subject headings:
Consumer behavior--Italy--Milan--Statistics.
Consumer behavior--Italy--Reggio Emilia--Statistics.
Music--Italy--Milan--Statistics.
Music--Italy--Reggio Emilia--Statistics.
Harvard subject headings:
Music--20th century--Social aspects--Italy.
Music--Social aspects
Popular music--Social aspects--Italy.
Princeton subject headings:
Music--Italy--20th century--Social aspects.
Music--Social aspects.