000 00257nam a2200109Ia 4500
008 190911s9999||||xx |||||||||||||| ||und||
100 _aDennis Shasha
245 0 _aCodes, Puzzles, and Cospiracy
260 _aUSA
_bPearson
_c1992
300 _a242
942 _cBK
999 _c6893
_d6893