Radio regulations :  ITU-R Recommendations incorporated by reference / 

 - Edition of 2020. 
 - [Place of publication not identified]  ITU,  2020. 
 - vii, 520 pages :  30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Standard-frequency and time-signal emissions.
<br/><br/><label>Dewey Class. No.: </label>341.7577  / R12