Columbia subject headings:
Drama, Medieval--History and criticism--Congresses.
Music--500-1400--History and criticism--Congresses.
Music--Spain--500-1400--History and criticism--Congresses.
Spanish drama--To 1500--History and criticism--Congresses.
Theater--History--Medieval, 500-1500--Congresses.
Theater--Spain--History--Medieval, 500-1500--Congresses.
Harvard subject headings:
Misteri d'Elx--History--Congresses.
Music--500-1400--Congresses.
Music--500-1400--History and criticism--Congresses.
Theater--History--Medieval, 500-1500--Congresses.
Theater--Spain--History--Medieval, 500-1500--Congresses.
Princeton subject headings:
Drama, Medieval--History and criticism--Congresses.
Music--500-1400--History and criticism--Congresses.
Music--Spain--500-1400--History and criticism--Congresses.
Spanish drama--To 1500--History and criticism--Congresses.
Theater--History--Medieval, 500-1500--Congresses.
Theater--Spain--History--Medieval, 500-1500--Congresses.