Columbia subject headings:
Catholic Church--Catechisms--Italian--History and criticism.
Catholic Church. Catechismo della dottrina cristiana pubblicato per ordine di sua santità papa Pio X.
Pius X, Pope, 1835-1914.
Harvard subject headings:
Catholic Church--Catechisms--History and criticism.
Catholic Church--Catechisms--Italian.
Pius X, Pope, 1835-1914.
Princeton subject headings:
Catholic Church--Catechisms--Italian--History and criticism.
Catholic Church. Catechismo della dottrina cristiana pubblicato per ordine di Sua Santità papa Pio X.
Christian education--Italy--History.
Pius X, Pope, 1835-1914.
Religious education--Italy--History.