00515nam a2200157Ia 4500 300273 20160527183802.0 0244-G (MF) C 13.3/4: Time & frequency bulletin Boulder, CO National Bureau of Standards Description based on: No. 341 (Apr. 1986); title from cover Time-signals 283907 Local Radio frequency Measurement 267232 Local United States National Bureau of Standards. 182913 Local 219157 219157 0 0 sudoc 0 C_13_300000000000000_4 0 doc 36534 10 10 9 2016-05-27 federal depository 455419 0 C 13.3/4 80000C 13.3/4 2016-05-27 00:00:00 electronic r:300273 6