Columbia subject headings:
Casa di pena di Civitavecchia--History--Sources.
Italy--History--1922-1945--Sources.
Political prisoners--Italy--Civitavecchia--History--Sources.
Prisons--Italy--Civitavecchia--History--Sources.
Harvard subject headings:
Casa di pena di Civitavecchia--History--Sources.
Italy--History--1922-1945--Sources.
Political prisoners--Italy--Civitavecchia--History--Sources.
Princeton subject headings:
Casa di pena di Civitavecchia--History--Sources.
Italy--History--1922-1945--Sources.
Political prisoners--Italy--Civitavecchia--History--Sources.