Columbia subject headings:
Catholic Church. Codex Juris Canonici.
Constitutional law--Vatican City.
Harvard subject headings:
Catholic Church. Codex juris canonici.
Catholic Church. Pope (1846-1878 : Pius IX). Apostolicae sedis (12 Oct.
Catholic Church. Pope (1846-1878 : Pius IX). Apostolicae sedis moderatione.
Censures, Ecclesiastical.
Princeton subject headings: