TY - `BOOK` AU - Friedman, William F. AU - Friedman, Elizebeth S. TI - The Shakespearean ciphers examined : an analysis of cryptographic systems used as evidence that some author other than William Shakespeare wrote the plays commonly attributed to him PB - Univ. Pr. CY - Cambridge PY - 1957 LA - eng SE - XVI, 302 S. CN - G 8176-79 CN - SHA BG 820 AN - UBHD-2146678 ER -