Sawhney, A K <br/><br/>
A course in electrical and electronic measurements and instrumentation 19th ed. 

 - Dhanpat rai and company pvt.ltd.  Delhi  2018 
 - I-23,1320(xii) 
<br/><br/>
<br/><br/><br/>E 
<br/><br/><label>Universal Decimal Class. No.: </label>621.37  / Saw/Saw