Columbia subject headings:
Harvard subject headings:
Calabria, Giovanni, Saint, 1873-1954--Correspondence.
Schuster, Ildefonso, 1880-1954--Correspondence.
Princeton subject headings:
Calabria, Giovanni, 1873-1954--Correspondence.
Cardinals--Italy--Correspondence.
Catholic Church--Italy--Clergy--Correspondence.
Schuster, Ildefonso, 1880-1954--Correspondence.