NDRC; Speech Scrambling ( Military )
NDRC; Speech Scrambling ( Military )
Speech and Facsimile Scrambling and Decoding. Washington D.C. 1946. COPY NO.130 Volume 3. ( secret ) Classification Cancelled 1970 by U.S. Coast Guard
Office of Scientific Research and Development.
1946 Hardcover; Good+ no dj. Very clean and solid, Minor bumping and rubbing.
