Rao, Satyanarayana <br/><br/>
Electrical Measurements and Measuring Instruments  A Textbook for Engineering Students 

 - Delhi  Khanna Publishers 
 - 344p. 
<br/><br/><label>Subjects--Index Terms: </label>Oscillographs, Vacuum tube Voltmeter, Potentiometer, Indicating Instruments 
<br/><br/><label>Dewey Class. No.: </label>621.37