Ieee standard definitions of physical quantities for fundamental frequency and time metrology / 
Sponsor instrumentation and measurement group of the ieee power engineering Society 
 - 20 páginas 
 - Ieee std 1139-1988 .
<br/><br/> "approved october 20, 1988 ieee standards board" 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medición--Terminologia<br/>Constantes físicas--Terminología
<br/><br/><label>LC Class. No.: </label>QC100  / I44