00302nam a2200097Ia 4500008004100000082001900041100002000060245007900080260003900159300000600198250903b        |||||||| |||| 00| 0 eng d  a510.9bG227.MP  aGardner, Martin  aThe 2nd Scientific American book of mathematical puzzles and diversionsb/  aNew York:bSimon & Schuster,c1961  a