000 00482nam a22002057a 4500
003 OSt
005 20250429114629.0
008 250421b |||||||| |||| 00| 0 eng d
022 _aa
040 _cDO
082 _a652 F8871c 1967
100 _aFrench, P.
245 _aCyphers
264 _aNew York: McGraw-Hill Publishing Company, 1967
300 _a52p.; 20cm.
490 _aExploring mathematics
650 _xCiphers
650 _xSigns and symbols
942 _2ddc
_cBK
999 _c5298
_d5298