00725nam a2200181Ia 4500003000900000008004100009040001600050080002200066111010600088245018400194260005000378300002300428650001900451650000900470650001900479700002200498700002300520IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a529.2(082.1)bSEM  aInternational Astronomical Union ColloquiumcNational Physical Laboratory, New Delhid1976 nov. 18-20 0aTime and frequencybproceedings of the seminar on time and frequency, held in National Physical Laboratory, New Delhi, november 18-20, 1976cedited by B.S. Mathur and  P. Banerjee  aNew DelhibNational Physical Laboratoryc1977  a[various pagings.]  aNASA thesaurus  aTime  aTime Frequency  aBanerjee, P., ed.  aMathur, B. S., ed.