00554nam a2200157Ia 4500 260909b |||||||| |||| 00| 0 eng d 1584884703 518.11 M726.C Mollin, Richard A. 27398 Codes : the guide to secrecy from ancient to modern times / Boca Raton: Chapman & Hall/CRC Press, 2005 xx, 679p. Bibl. Index. Discrete Mathematics and its applications "Purchased under NBHM grant for the year 2005-2006" ddc BK 0 0 0 518_110000000000000_M726_C 0 28229 ISI ISI 2005-09-14 SBD 361809.58 0 518.11 M726.C DP27225 2019-02-14 00:00:00 BK Ord num:6755; Ord dt:2005-09-10 27158 27158