Columbia subject headings:
Operas--Excerpts--Scores.
Harvard subject headings:
Operas--Excerpts--Scores
Princeton subject headings:
Excerpts.
Operas--Analysis, appreciation.
Operas--Excerpts--Scores.
Operas.
Scores.
Wagner, Richard, 1813-1883. Tristan und Isolde. 1. Aufzug. Einleitung
Wagner, Richard, 1813-1883. Tristan und Isolde. Liebestod