Columbia subject headings:
Harvard subject headings:
Authors--20th century--Correspondence.
Communists--Germany--Correspondence.
Kommunistische Partei Deutschlands--History--20th century--Sources.
Mann, Heinrich, 1871-1950--Correspondence.
Mann, Heinrich, 1871-1950. Correspondence.
Ulbricht, Walter, 1893-1973--Correspondence.
Princeton subject headings:
Anti-Nazi movement--Germany.
Authors, German--20th century--Correspondence.
Communists--Germany--Biography.
Mann, Heinrich, 1871-1950--Correspondence.
Ulbricht, Walter, 1893-1973--Correspondence.