Association of Religion Data Archives
Association of Religion Data Archives: Denominational Family Tree: Presbyterian Family
A graphic representation giving the various religious sects and groups that make up the Presbyterian church in the United States along with a timeline. Provides additional information on certain groups when you do a mouse-over.
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Presbyterian Church in America
Start here! Has click-on links to history, beliefs, church directory, and more.
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Reformed.org: John Knox: The Watchman of Scotland
History of the Presbyterian Church presents a profile of its founding father, including an examination of his theological writings.