Operation Regal : the Berlin Tunnel (S-CCO) [strikethrough].

Bibliographic Details
Format:	Government Document eBook
Language:	English
Published:	[Fort George G. Meade, Md.] : National Security Agency/Central Security Service, 1988.
Series:	United States cryptologic history. Special series ; no. 4.
Subjects:	Cryptography > Germany > History > 20th century.
Online Access:	https://purl.fdlp.gov/GPO/gpo40558

Available Online