TY  - BOOK
AU  - Blair,Byron E.
TI  - Time and frequency: theory and fundamentals
T2  - NBS monograph
PY  - 1974///
CY  - [Washington]
PB  - U.S. National Bureau of Standards, 
KW  - TIME MEASUREMENT
KW  - inist
KW  - MEDIDA DE TIEMPO
KW  - Atomic frequency standards
N1  - Incluye bibliografía
ER  -