OT report. - United States. (U.S. Dept. of Commerce, Office of Telecommunications, 1973)
Also issued online.
Keywords: Telecommunication. / fast / http://id.worldcat.org/fast/1145830; Telecommunication / United States. / http://id.loc.gov/authorities/subjects/sh2008112726; United States. / fast / http://id.worldcat.org/fast/1204155