Sandor Lehoczky · 6 obras en el catálogoObrasThe Art of Problem SolvingThe art of problem solvingAArt of Problem Solving, Volume 1Art of Problem Solving, Volume 1TThe Art of Problem Solving, Volume 2The Art of Problem Solving, Volume 2TThe art of problem solvingThe art of problem solving1993The Art of Problem Solving Vol. 2
