Columbia subject headings:
Christian sociology--Catholic Church.
Vatican Council (1st : 1869-1870 : Basilica di San Pietro in Vaticano)
Harvard subject headings:
Christian sociology--Catholic Church.
Vatican Council (1st : 1869-1870 : Basilica di San Pietro in Vaticano)
Princeton subject headings:
Church and social problems--Catholic Church.
Church and state--Catholic Church.
Liberalism.
Vatican Council (1st : 1869-1870).