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^ Rynor, Micah (October 20, 2005). "Holy Grail legend
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^ Wagner, Wilhelm, Romance and Epics of Our Northern
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^ Donington, Robert (1963). Wagner's "Ring" and its
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^ Hansen, H. T. The Mystery of the Grail, p. vii.
^ Baigent, Michael; Leigh, Richard; Lincoln, Henry
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^ Juliette Wood, Folklore, Vol. 111, No. 2. (Oct.,
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^ "The Holy Grail: From Romance Motif to Modern Genre"

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