00788cam a2200253 a 4500 20230110144623.0 070418s2001 nyum b a001 0 eng 00-046368 0684869985 (OCoLC)45008501 DLC DLC CIN Z103 .B88 2001 652/.8 21 Butler, William S. Secret messages : concealment, codes, and other types of ingenious communication / William S. Butler and L. Douglas Keeney. New York : Simon & Schuster, c2001. 192 p. : ill. ; 22 cm. Includes bibliographical references (p. 179-181) and index. Ciphers. Cryptography. Keeney, L. Douglas. lcc 44000 44000 0 0 lcc 0 0 FUJM FUJ FUJ 2023-01-10 0 0228129 2023-01-10 00:00:00 1 2023-01-10 BK VIRTUAITEM 0 0 lcc 0 0 MYC MYC 2023-01-10 0 0228127 2023-01-10 00:00:00 1 2023-01-10 BK VIRTUAITEM 0 0 lcc 0 0 RKLM RKL RKL 2023-01-10 0 0228126 2023-01-10 00:00:00 1 2023-01-10 BK VIRTUAITEM