General service code, information and practice material.

Bibliographic Details

Corporate Author:	United States. Army. Signal Corps
Format:	Government Document eBook
Language:	English
Published:	[United States] : [publisher not identified], 1931.
Series:	Signal School Pamphlet No. 53
Subjects:	Ciphers. Military education. Electronic books.
Online Access:	Connect to the full text of this electronic document