Columbia subject headings:
Harvard subject headings:
Jewish communists--Germany--Biography.
Jewish women--Germany--Biography
Kautsky, Luise Ronsperger, 1864-1944--Friends and associates.
Kautsky, Luise Ronsperger, 1864-1944.
Luxemburg, Rosa, 1871-1919
Women communists--Germany--Biography.
Princeton subject headings:
Kautsky, Luise Ronsperger, 1864-1944.
Luxemburg, Rosa, 1871-1919--Friends and associates.
Socialists--Germany--Biography.