Columbia subject headings:
Communists--Biography.
Communists--Correspondence.
Jogiches, Leo, 1867-1919.
Luxemburg, Rosa, 1871-1919.
Harvard subject headings:
Communists--Biography
Communists--Correspondence
Jogiches, Leo, 1867-1919.
Luxemburg, Rosa, 1871-1919
Princeton subject headings:
Communists--Biography.
Communists--Correspondence.
Jogiches, Leo, 1867-1919.
Luxemburg, Rosa, 1871-1919.