Columbia subject headings:
Harvard subject headings:
Communism--Philosophy--Bibliography.
Liberty--Philosophy
Philosophy--Italy--History--20th century--Bibliography.
Prestipino, Giuseppe--Bibliography.
Socialism--Philosophy--Bibliography.
Princeton subject headings:
Communism--Philosophy--Bibliography.
Liberty--Philosophy.
Philosophy--Italy--History--20th century--Bibliography.
Prestipino, Giuseppe--Bibliography.
Socialism--Philosophy--Bibliography.