• 2 Music Library (Mills)

• 1 DVDs

• 1 Operas

• 2 Levine, James, 1943-2021
• 2 Metropolitan Opera (New York, N.Y.)
• 2 Schneider-Siemssen, Günther
• 2 Wagner, Richard, 1813-1883
• 1 Allen, Thomas, 1944-
• 1 Berkowitz, Phebe
• 1 Cassilly, Richard, 1927-1998
• 1 Grove, Jill
• 1 Heppner, Ben
• 1 Langenfass, Rolf
• 1 Large, Brian
• 1 Macurdy, John
• 1 Marton, Eva
• 1 Mattila, Karita
• 1 McClintock, Peter
• 1 Morris, James, 1947-
• 1 Pape, René
• 1 Polenzani, Matthew
• 1 Relyea, John
• 1 Troyanos, Tatiana
• 1 Weikl, Bernd
• 1 Zipprodt, Patricia, 1925-1999

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