• 11 Books

• 4 Composers
• 3 Criticism and interpretation
• 2 Frankl, Viktor E. (Viktor Emil), 1905-1997
• 2 History
• 2 Logotherapy
• 1 Antisemitism
• 1 Aquatic biology
• 1 Atomic theory
• 1 Beethoven, Ludwig van, 1770-1827
• 1 Berg, Alban, 1885-1935
• 1 Boltzmann, Ludwig, 1844-1906
• 1 Environmental protection
• 1 Haneke, Michael, 1942-
• 1 Heads of state
• 1 Hitler, Adolf, 1889-1945
• 1 Holocaust, Jewish (1939-1945)
• 1 Mahler, Gustav, 1860-1911
• 1 Motion picture producers and directors
• 1 Mozart, Wolfgang Amadeus, 1756-1791
• 1 Music
• 1 Music appreciation
• 1 National socialism
• 1 Naturalists
• 1 Philosophers
• 1 Philosophy and aesthetics

• 2 Frankl, Viktor E. (Viktor Emil), 1905-1997
• 1 Adorno, Gretel
• 1 Adorno, Theodor W., 1903-1969
• 1 Alexandersson, Olof, 1917-
• 1 Armborst, Stefan
• 1 Blasco Mayor, Lucía
• 1 Buck-Morss, Susan
• 1 Chamorro, Joaquín
• 1 Denk, Alois
• 1 Freire, José Benigno
• 1 Hernández Les, Juan
• 1 Katarain Velez, José Vicente
• 1 Kershaw, Ian
• 1 La Grange, Henry-Louis de, 1924-2017
• 1 López Martín, Francisco
• 1 Moreno Luzón, Javier
• 1 Padilla Villate, José Antonio
• 1 Schulz, Klaus, 1947-2014
• 1 Steinitzer, Max, 1864-1936
• 1 Strathern, Paul, 1940-
• 1 Sánchez Guillén, Joaquín
• 1 Tiedemann, Rolf
• 1 Visiers Würth, Cristina

• 11 Spanish

• 2 Germany

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