Columbia subject headings:
Communism--Biography--Dictionaries.
Communism--Dictionaries.
Communists--Biography--Dictionaries.
Socialism--Biography--Dictionaries.
Socialism--Dictionaries.
Socialists--Biography--Dictionaries.
Harvard subject headings:
Communism--Dictionaries
Communists--Biography--Dictionaries.
Socialism--Dictionaries.
Socialists--Biography--Dictionaries.
Princeton subject headings:
Communism--Biography--Dictionaries.
Communism--Dictionaries.
Dictionaries.
Socialism--Biography--Dictionaries.
Socialism--Dictionaries.