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Capuchin Franciscan Friars of Australia
http://www.capuchinfriars.org.au/saints/crispin.shtml
Illustrated biography of St. Crispin of Viterbo.
Catholic Encyclopedia
http://www.newadvent.org/cathen/04491b.htm
St. Crispin of Viterbo, Capuchin lay brother, d. 1750.
For All the Saints
http://www.saintpatrickdc.org/ss/0521.htm#cris
Short biography of St. Crispin of Viterbo.