• 2 Music Library (Mills)

• 8 Videos, Slides, Films

• 2 DVDs

• 6 Interpretation (Phrasing, dynamics, etc.)
• 6 Singing
• 6 Tenors (Singers)
• 1 Björling, Jussi, 1911-1960
• 1 Cage, John
• 1 Caruso, Enrico, 1873-1921
• 1 Composers
• 1 Criticism and interpretation
• 1 Gigli, Beniamino, 1890-1957
• 1 Kozlovsʹkyĭ, Ivan Semenovych, 1900-1993
• 1 McCormack, John, 1884-1945
• 1 Melchior, Lauritz
• 1 Perlman, Itzhak, 1945-
• 1 Rosvænge, Helge, 1897-1972
• 1 Schipa, Tito, 1889-1965
• 1 Schmidt, Joseph, 1904-1942
• 1 Slezak, Leo, 1873-1946
• 1 Tauber, Richard, 1891-1948
• 1 Thill, Georges, 1897-1984

• 7 Westdeutscher Rundfunk
• 6 Bayerischer Rundfunk
• 6 Norddeutscher Rundfunk
• 6 Ostdeutscher Rundfunk Brandenburg
• 6 Pars Media (Firm)
• 6 Saarländischer Rundfunk
• 6 Schmidt-Garre, Jan
• 6 Sender Freies Berlin
• 6 Süddeutscher Rundfunk
• 1 Allegro Films (London, England)
• 1 Björling, Jussi, 1911-1960
• 1 Cage, John
• 1 Gigli, Beniamino, 1890-1957
• 1 Helms, Hans G. (Hans Günter), 1932-2012
• 1 Ifage-Filmproduktion
• 1 Kozlovsʹkyĭ, Ivan Semenovych, 1900-1993
• 1 McCormack, John, 1884-1945
• 1 Melchior, Lauritz
• 1 Nupen, Christopher
• 1 Perlman, Itzhak, 1945-
• 1 Rosvænge, Helge, 1897-1972
• 1 Schipa, Tito, 1889-1965
• 1 Schmidt, Joseph, 1904-1942
• 1 Slezak, Leo, 1873-1946

• 8 English
• 7 German
• 3 Multiple languages
• 2 Italian
• 1 French
• 1 Russian

• 1 Italy
• 1 United States

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