In his famous address at the Royaumont Seminar in 1959, Jean Dieudonné famously called for the elimination of Euclidean geometry from the secondary school curriculum. In the published (English-language) version of his remarks ("New Thinking in School Mathematics", 1959), Dieudonné expressed this call with the slogan "Euclid must go!", and most subsequent references to this speech quote him with that.
But a different (and stronger) version of this slogan is quoted in Siobhan Roberts's book King of Infinite Space: Donald Coxeter, the Man Who Saved Geometry. In that book (p. 157) Dieudonné is quoted as saying (in French) "A bas Euclide! Mort aux triangles!" ("Down with Euclid! Death to triangles!"). Roberts cites three sources for this quote -- but two of them are to books that include the other version ("Euclid must go!"), and the third seems to be to an unpublished interview the author conducted with Imre Toth.
So my question:
We know what Dieudonné wrote in the published version of his Royaumont address, but (apparently) Imre Toth remembers him saying something different. Does anybody know if there is any other published source, other than Roberts, that can shed light on what Dieudonné actually said at Royaumont?