Time and frequency  proceedings of the seminar on time and frequency, held in National Physical Laboratory, New Delhi, november 18-20, 1976 
edited by B.S. Mathur and  P. Banerjee 
 - New Delhi  National Physical Laboratory  1977 
 - [various pagings.] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NASA thesaurus<br/>Time<br/>Time Frequency
<br/><br/><label>Universal Decimal Class. No.: </label>529.2(082.1)  / SEM