Protection of defense communications.
Subtitle: Hearing before the Subcommittee to Investigate the Administration of the Internal Security Act and Other Internal Security Laws, of the Committee of the Judiciary, United States Senate, Eighty-sixth Congress, second session.  April 19, 1960.
Publisher: U.S. Govt. Print. Off.
Published: 1960
Place of publication: Washington
Language: eng
Number of pages: 69
Subjects: Telecommunication -- United States; Civil defense -- United States; United States -- Defenses