Columbia subject headings:
Harvard subject headings:
Conference papers and proceedings.
Heavy metal (Music)--History and criticism--Congresses.
Heavy metal (Music)--Political aspects--History--Congresses.
Music--Political aspects--History--Congresses.
Princeton subject headings:
Heavy metal (Music)--History and criticism--Congresses.
Heavy metal (Music)--Political aspects--History--Congresses.
Music--Political aspects--History--Congresses.