Title: El gran libro de las ilusiones ópticas
Subjects: Optical illusions, Experiments, Pictorial works, History, Spanish language materials, Optical Illusions, Illusions d'optique, Expériences, Ouvrages illustrés, Histoire, Optical illusion, Ilusiones ópticas, Experimentos, Ilusiones ?pticas, Libros da l?minas, Historia