Biographical article on this Cluniac, abbot of Hirschau, monastic reformer, astronomer, musician, who died in 1091. In the Catholic Encyclopedia. www.newadvent.org/cathen/15629b.htm
Much of this article in the New Schaff-Herzog Encyclopedia of Religious Knowledge is devoted to biographical information on Abbot William and the monastic reforms he introduced. Includes bibliography. Requires ability to view PNG files. www.ccel.org/../..
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