- An article from the Catholic Encyclopedia ...www.newadvent.org/cathen/15728a.htm
- An article from the Catholic Encyclopedia ...www.newadvent.org/cathen/15729a.htm
- An article from the Catholic Encyclopedia ...www.newadvent.org/cathen/15729b.htm
- An article from the Catholic Encyclopedia ...www.newadvent.org/cathen/15728b.htm