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- catalog contributor b9981232.
- catalog contributor b9981233.
- catalog contributor b9981234.
- catalog created "1977.".
- catalog date "1977".
- catalog date "1977.".
- catalog dateCopyrighted "1977.".
- catalog description "Bibliography: p. 23.".
- catalog extent "v, 59 p. :".
- catalog isPartOf "NBS special publication ; 480-19".
- catalog issued "1977".
- catalog issued "1977.".
- catalog language "eng".
- catalog publisher "Washington : NBS : for sale by the Supt. of Docs., U.S. Govt. Print. Off.,".
- catalog subject "602/1 s 621.3845".
- catalog subject "Digital communications.".
- catalog subject "Mobile communication systems.".
- catalog subject "QC100 .U57 no. 480-19 TK5103.7".
- catalog subject "Radio frequency modulation.".
- catalog title "Digital data transmission tests on voice channels / by Urban Sciences, inc. ; prepared by Law Enforcement Standards Laboratory, Center for Consumer Product Technology, National Bureau of Standards ; prepared for National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration, U.S. Department of Justice.".
- catalog type "text".