TY - BOOK ID - 127653454 TI - Cryptography : the science of secret writing : : history and modern use of codes and ciphers, together with 151 problems and their solutions PY - 1943 PB - New York (N.Y.) : Dover, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:127653454 AB - ER -