June 23 – The first Lucha de Apuestas (Spanish for "Bet match") takes place in Mexico with El Murciélago Enmascarado defeated Merced Gómez to force Gómez to be shaved bald. If he had lost El Murciélago Enmascarado would have had to unmask. The Lucha de Apuestas match would become the most prestigious match type in Mexico subsequently.[2]
^"7th Anniversary Show". Pro Wrestling History. September 12, 1940. Retrieved September 27, 2012.
^ abcdefMadigan, Dan (2007). "The Mask in the match". Mondo Lucha A Go-Go: the bizarre & honorable world of wild Mexican wrestling. HarperCollins Publishers. pp. 60–61. ISBN978-0-06-085583-3.
^ abDuncan, Royal; Will, Gary (2006). "Mexico: EMLL NWA World Middleweight Title [Lutteroth]". Wrestling title histories: professional wrestling champions around the world from the 19th century to the present (4th ed.). Archeus Communications. pp. 389–390. ISBN0-9698161-5-4.
^ abcdeRoyal Duncan and Gary Will (2000). "Mexico: National Heavyweight Title". Wrestling Title Histories. Archeus Communications. pp. 390–391. ISBN0-9698161-5-4.
^ abRoyal Duncan and Gary Will (2000). "Mexico: National Welterweight Title". Wrestling Title Histories. Archeus Communications. p. 397. ISBN0-9698161-5-4.
^ abcRoyal Duncan and Gary Will (2000). "Mexico: National Lightweight Title". Wrestling Title Histories. Pennsylvania: Archeus Communications. p. 393. ISBN0-9698161-5-4.
^ abRoyal Duncan and Gary Will (2000). "Mexico: National Welterweight Title". Wrestling Title Histories. Archeus Communications. p. 392. ISBN0-9698161-5-4.
^ abRoyal Duncan & Gary Will (2006). "Mexico: EMLL NWA World Middlweight Title". Wrestling Title Histories (4th ed.). Archeus Communications. pp. 389–390. ISBN0-9698161-5-4.
^ abcdeLourdes Grobet; Alfonso Morales; Gustavo Fuentes & Jose Manuel Aurrecoechea (2005). Lucha Libre: Masked Superstars of Mexican Wrestling. Trilce. p. 115. ISBN978-1-933045-05-4.