Columbia subject headings:
Charles, Archduke of Austria, 1540-1590.
Choruses, Secular (Mixed voices), Unaccompanied.
Motets.
Harvard subject headings:
Charles, Archduke of Austria, 1540-1590--Songs and music.
Choruses, Secular (Mixed voices), Unaccompanied.
Motets.
Part songs, Latin.
Princeton subject headings:
Charles, Archduke of Austria, 1540-1590--Songs and music.
Choruses, Secular (Mixed voices), Unaccompanied.
Motets.