| Type |  Book |
| ชื่อเรื่อง | 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 / William F. Friedman and Elizabeth S. Friedman |
| ผู้แต่ง | Friedman, William frederick 1891- |
| พิมพลักษณ์ | London : Cambridge, Eng. Univ. Pr., 1957 |
| รูปเล่ม | 302 p. : ill. ; 22 cm |
| หัวเรื่อง | Ciphers |
| | Cryptography |