Secret and urgent ; the story of codes and ciphers / by Fletcher Pratt.
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
Indianapolis ; New York :
The Bobbs-Merrill Company,
[1939], [©1939]
|
| Subjects: | |
| Physical Description: | 282 pages ; 25 cm |
| Format: | Book |
Search Result 1
Published: Blue Ribbon Books, 1942
Secret and urgent ; the story of codes and ciphers.
Published: Blue Ribbon Books, 1942
Physical Description:
282 pages, 3 leaves : diagrams ; 21 cm
Book