Presents Indian sign language, Morse code, Jefferson's cipher wheel and other European and American codes and ciphers from ancient times to the present, in their historical contextSemaphore Chart from The Bluejacketsa#39; Manual, 20th edition, edited by Bill Bearden. Copyright Ac 1978, United States Naval Institute, Annapolis, Maryland. Copyright Ac 1989 by Fred B. Wrixon All rights reserved. First published in 1989 byanbsp;...
|Title||:||Codes, Ciphers, and Secret Languages|
|Author||:||Fred B. Wrixon|
|Publisher||:||Random House Value Publishing - 1989|