Standard-frequency and time-signal emissions

@techreport{utc-itu2002,
   apice = {UtcItu2002},
   author = {ITU Radiocommunication Assembly},
   institution = {International Telecommunications Union},
   number = {ITU-R TF.460-6},
   title = {Standard-frequency and time-signal emissions},
   type = {Recommendation},
   url = {https://www.itu.int/dms_pubrec/itu-r/rec/tf/R-REC-TF.460-6-200202-I!!PDF-E.pdf},
   year = 2002
}