Classificação da Biblioteca do Congresso dos EUA (LCC)Z103.K28
⮑ Z4-115.5. Books (General). Writing. Paleography
⮑ Z40-104.5. Writing
Selected Works (2,320 no total)
- Codes, Ciphers and Other Cryptic and Clandestine Communication: 400 Ways to Send Secret Messages from Hieroglyphs to the Internet por Fred B. Wrixon