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^Madigan, Dan (2007). "Los Enmascarados (the masked men): El Demonio Azul (the Blue Demon)". Mondo Lucha a Go Go: the bizarre& honorable world of wild Mexican wrestling. HarperCollins Publishers. pp. 79–90. ISBN978-0-06-085583-3.
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^ abDuncan, Royal; Will, Gary (2000). ""United States: 19th century & widely defended titles – NWA, WWF, AWA, IWA, ECW, NWA: NWA World Heavyweight Title"". Wrestling title histories: professional wrestling champions around the world from the 19th century to the present. Waterloo, ON: Archeus Communications. p. 15. ISBN0-9698161-5-4.
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