Columbia subject headings:
Bloch, Ernst, 1885-1977--Correspondence.
Philosophers--Germany--Correspondence.
Philosophy.
Harvard subject headings:
Bloch, Ernst, 1885-1977--Correspondence.
Philosophers--Germany--Correspondence
Philosophy.
Princeton subject headings:
Bloch, Ernst, 1885-1977--Correspondence.
Philosophers--Germany--Correspondence.
Philosophy.