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A guide to voice scramblers for law enforcement agencies /
Robert E. Nelson ; prepared by the Law Enforcement Standards Laboratory, Center for Consumer Product Technology, National Bureau of Standards, for the National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration, Department of Justice.



Main Author: Nelson, Robert Edward, 1931-
Language(s): English
Published: Washington : U.S. Dept. of Commerce, National Bureau of Standards : 1976.
Subjects: Police communication systems > Police communication systems / Security measures.
Speech scramblers.
Physical Description: 34 p. : ill. ; 26 cm.
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