How to write codes and send secret messages
Edición de la obra How to Write Codes and Send Secret Messages
| Autor | John Lawrence Peterson |
|---|---|
| Editorial | Four Winds Press |
| Fecha de publicación | 1970 |
| Lugar | New York |
| Idioma | inglés |
| Páginas | 64 |
| LCCN | 68027278 |
| Número de Cutter | P485h |
Explains how to write and decipher space codes, hidden word codes, and alphabet codes and gives formulas for invisible ink. Includes suggestions for delivering coded messages.