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Willow Creek Press. September 2000.
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Jeep, John M. Medieval Germany: An Encyclopedia (Routledge Encyclopedias of the Middle Ages). Routledge; 1 edition. January 10, 2001.
Miles, Clement A. Christmas in Ritual and Tradition, Christian and Pagan. Biblio Bazaar. 2008.
Philpot, J.H. The Sacred Tree; or the Tree in Religion and Myth. Dover Publications. May 11, 2004.
Sheryl Ann Karas. The Solstice Evergreen: The History, Folklore and Origins of the Christmas Tree. Rev. Ed. Fairfield: Aslan Publishing. 1998.
Tille, Alexander. Yule and Christmas: their Place in the Germanic Year. Strand London, 1899.
Walsh, William S. Curiosities of Popular Customs and of Rites, Ceremonies, Observances, and Miscellaneous Antiquities. JB Lippincott Co. Philadelphia. 1898.
Wernecke, Herbert Henry. Christmas customs around the world 1912. Westminster Press. 1912.
Spicer, Dorothy Gladys. Festivals of Western Europe. BiblioBazaar. March 3, 2008.
Frequently Asked Questions National Christmas Tree Association./
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