Secret and urgent; the story of codes and ciphers.

; Lamb, George C., Collection ; American Cryptogram Association
Garden City, N.Y. : Blue Ribbon Books, [1942] .

Location Call Number Status Consortium Loan
American
LIB stacks
Z104 .P92 1942 Available Request
Georgetown
Off-Campus Shelving - Request in Special Collections
MI-407 SPC USE ONLY
Other Authors Lamb, George C., Collection.
American Cryptogram Association.
Subjects Ciphers.
Cryptography.
Description 282 p. : ill. ; 21 cm.
Notes Also issued online.
Network Numbers (OCoLC)ocm00795065
(OCoLC)795065
WorldCat Search OCLC WorldCat

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