Columbia subject headings:
Catholic Church--Belgium--Brussels--Liturgy--History.
Church music--Belgium--Brussels--15th century.
Church music--Belgium--Brussels--500-1400.
Church music--Catholic Church--15th century.
Church music--Catholic Church.
Church musicians--Belgium--Brussels--15th century.
Church musicians--Belgium--Brussels--500-1400.
Music--Belgium--Brussels--15th century--History and criticism.
Music--Belgium--Brussels--500-1400--History and criticism.
Harvard subject headings:
Church music--Belgium--Brussels.
Music--Belgium--Brussels--History and criticism.
Princeton subject headings:
Church music--Belgium--Brussels.
Facsimiles.
Music--Belgium--Brussels--History and criticism.