- i.p.i.
- i.p.i.
► Abbreviation in general use, chiefly Ecclesiasticalin partibus infidelium ("among the infidels")The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.
The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.