Time and Frequency  Journal of the institution of electonics and telecommunication engineers; vol. 27, no. 10, October 1981 
edited by Ranjit Singh                                       
 - New Delhi  National Physical Laboratory  1981 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Frequency<br/>NASA Thesaurus<br/>Time
<br/><br/><label>Universal Decimal Class. No.: </label>529.2(082.1)  / TIM