Catholic Encyclopedia - St. Gertrude of Nivelles, Benedictine abbess of a double monastery, d. 659. www.newadvent.org/cathen/06533c.htm
For All the Saints - Brief biography of St. Gertrude of Nivelles, with links to other saints with whom she was associated. users.erols.com/saintpat/ss/0317.htm#gert
Patron Saints Index - Profile of St. Gertrude of Nivelles. www.catholic-forum.com/saints/saintg14.htm
The Ecole Glossary - Short biography of St. Gertrude of Nivelles, by Karen Rae Keck. cedar.evansville.edu/~ecoleweb/glossary/gertniv.html
