Columbia subject headings:
Music rehearsals--Congresses.
Music--Performance--Congresses.
Performing arts--Production and direction--Congresses.
Theater rehearsals--Congresses.
Theater--Performance--Congresses.
Harvard subject headings:
Music--History and criticism--Congresses
Theater--History--Congresses.
Princeton subject headings:
Music rehearsals--Congresses.
Music--Performance--Congresses.
Performing arts--Production and direction--Congresses.
Theater rehearsals--Congresses.
Theater--Performance--Congresses.