Columbia subject headings:
Arendt, Hannah, 1906-1975--Marriage.
Blücher, Heinrich, 1899-1970--Marriage.
Philosophers--Germany--Biography.
Political scientists--Germany--Biography.
Harvard subject headings:
Arendt, Hannah, 1906-1975
Blücher, Heinrich, 1899-1970.
Princeton subject headings:
Arendt, Hannah, 1906-1975.
Blücher, Heinrich, 1899-1970.