Columbia subject headings:
Apel, Karl-Otto.
Jonas, Hans, 1903-1993.
Lévinas, Emmanuel.
Responsibility.
Harvard subject headings:
Apel, Karl-Otto.
Ethics--History--20th century
Jonas, Hans, 1903-1993.
Lévinas, Emmanuel
Philosophy, Modern--20th century.
Responsibility
Princeton subject headings:
Apel, Karl-Otto.
Ethics--History--20th century.
Jonas, Hans, 1903-1993.
Lévinas, Emmanuel.
Philosophy, Modern--20th century.
Responsibility.