Columbia subject headings:
Britten, Benjamin, 1913-1976.
Mahler, Gustav, 1860-1911.
Harvard subject headings:
Britten, Benjamin, 1913-1976--Criticism and interpretation.
Mahler, Gustav, 1860-1911--Criticism and interpretation.
Princeton subject headings:
Britten, Benjamin, 1913-1976.
Mahler, Gustav, 1860-1911.