"Philosophie Jugendsachbuch." . . . "Jugendsachbuch" . . . "The outer limits : [more mysteries from the philosophy files]"@en . "The outer limits : more mysteries from the philosophy files" . "Juvenile works"@en . "Juvenile works" . . . "Philosophie : Denken ohne Grenzen" . . . . . . . . "The outer limits"@en . "The outer limits" . . . "Philosophie." . . . .