Columbia subject headings:
Harvard subject headings:
Kracauer, Siegfried, 1889-1966--Correspondence.
Lowenthal, Leo--Correspondence.
Sociologists--Germany--Correspondence.
Sociologists--United States--Correspondence.
Princeton subject headings:
Kracauer, Siegfried, 1889-1966--Correspondence.
Lowenthal, Leo--Correspondence.
Personal correspondence.
Sociologists--Germany--Correspondence.
Sociologists--United States--Correspondence.