TY  - BOOK
ED  - International Telecommunication Union.
TI  - ITU-R recommendations 1994 TF series :time signals and frequency standards emisssions
SN  - 9261053114
U1  - 621.396 I.T.U. 
PY  - 1994///
PB  - International Telecommunication Union
KW  - Time signals and frequency
ER  -