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WikiPedia: Jean-Jacques_Velasco http://ovni-extraterrestre.com/geipan-et-ovni http://www.cnes-geipan.fr/ http://ufologie.net/htm/sepraint1f.htm http://www.ufologie.net/htm/seprlet1f.htm http://rr0.org/personne/v/VelascoJeanJacques/ https://www.le-journal-catalan.com/70-ans-apres-je... https://www.ladepeche.fr/article/2007/03/07/2452-o... https://www.lemonde.fr/societe/article/2012/02/26/... https://www.clicanoo.re/Societe/Article/2013/08/01...