Walther Ziegler

• Descartes in 60 Minuten
• Camus in 60 Minuten
• Adorno in 60 Minuten
• Arendt in 60 Minuten
• Camus en 60 Minutes
• Camus in 60 Minutes
• Freud en 60 Minutes
• Freud in 60 Minutes
• Great Thinkers in 60 Minutes - Volume 1
• Great Thinkers in 60 Minutes - Volume 2
• Habermas in 60 Minuten
• Hegel en 60 Minutes