Columbia subject headings:
Harvard subject headings:
Italy--History--19th century--Sources.
Valdocco (Italy)--History--Sources.
Princeton subject headings:
Bosco, Giovanni, Saint, 1815-1888.
Catholic Church--Education--Italy--History--19th century.
Church and education--Italy--History--19th century.
Oratorio di S. Francesco di Sales (Turin, Italy)--History.
Salesians--Italy--History--19th century.