Columbia subject headings:
Catholic Church--History--20th century--Sources.
Prisoners of war--History--20th century--Sources.
World War, 1939-1945--Prisoners and prisons--History--Sources.
World War, 1939-1945--Religious aspects--Catholic Church.
Harvard subject headings:
Archivio vaticano--Catalogs.
Pius XII, Pope, 1876-1958.
Prisoners of war--Sources.
World War, 1939-1945--Prisoners and prisons--Sources.
World War, 1939-1945--War work--Catholic Church--Sources.
Princeton subject headings: