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These are multiplying at an alarming rate. See this page for links to a few of them: Encyclopedia of Religion, Oxford Dictionary of the Christian Church, Encyclopedia of Religion in America...
http://www.drew.edu/depts/library/er-subject.aspx?category=E-Reference%20Bookshttp://www.drew.edu/library/resourcetype/religion_theologysites
Drew Library Orientation for DMin Students: Online Guide
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