"Jeux mathématiques." . . "Unterhaltungsmathematik." . . . . . . . "Fractal music, hypercards and more... : mathematical recreations from Scientific american magazine" . . . . . . . "Fractal music, hypercards and more : mathematical recreations from Scientific American Magazine" . . . . "Fractal music, hypercards and more ... : mathematical recreations from Scientific American" . "Fractal music, hypercards and more-- : mathematical recreations from Scientific American magazine" . . . "Fractal music, hypercards and more - : mathematical recreations from Scientific American magazine" . . "Fractal music, hypercards and more... : Mathematical Recreations from Scientific American Magazine" . . "Fractal music, hypercards and more... : mathematical recreations from Scientific American Magazine" . "Fractal music, hypercards and more : mathematical recreations from scientific American magazine/ Martin Gardner" . "Fractal music, hypercards and more- : mathematical recreations from Scientific American magazine" . . . . "Matemáticas recreativas." . . . . "Matemàtica recreativa." . . "Fraktal." . .