| 000 | 00388nam#a2200145ua#4500 | ||
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| 001 | GOACATREC16855 | ||
| 900 | 0 | 0 | _a19990831 |
| 901 | 0 | 0 | _aENG |
| 020 | 0 | 0 | _a0883855216 |
| 903 | 0 | 0 | _a80925 |
| 245 | 0 | 0 | _aPenrose Tiles to Trapdoor Ciphaers : And the Return of Dr. Matrix. |
| 100 | 0 | 0 | _aGardner, Martin. |
| 902 | 0 | 0 | _a510 |
| 260 | 0 | 0 |
_aWashington D.C. _bMathematical Association of America. _c1997 |
| 999 |
_c16878 _d16878 |
||