Columbia subject headings:
Harvard subject headings:
Araquistain, Luis, 1886-1959.
Communism--Spain
Socialism--Spain
Socialists--Spain--Biography
Spain--History--Civil War, 1936-1939.
Princeton subject headings:
Araquistain, Luis, 1886-1959.
Communism--Spain.
Socialism--Spain.
Socialists--Spain--Biography.
Spain--History--Civil War, 1936-1939.