Columbia subject headings:
Bultmann, Rudolf, 1884-1976--Correspondence.
Heidegger, Martin, 1889-1976--Correspondence.
Harvard subject headings:
Bultmann, Rudolf, 1884-1976--Correspondence.
Death.
Heidegger, Martin, 1889-1976--Correspondence.
Princeton subject headings:
Bultmann, Rudolf, 1884-1976--Correspondence.
Heidegger, Martin, 1889-1976--Correspondence.