Columbia subject headings:
Harvard subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied--19th century.
Choruses, Secular (Mixed voices), Unaccompanied--19th century.
Princeton subject headings:
Choruses, Sacred (Mixed voices), Unaccompanied--19th century.
Choruses, Secular (Mixed voices), Unaccompanied--19th century.