Blair, B E <br/><br/>
Precision measurement and calibration:   Selected NBS papers on frequency and time 

 - Washington, D.C.:   National Bureau of Standards,   1972 
 - NBS special publication 300  Vol. 5 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Atomic frequency standards
<br/><br/><label>Subjects--Index Terms: </label>Physical instruments Frequencies of oscillating systems 
<br/><br/><label>Universal Decimal Class. No.: </label>53.08  / L2.5