Helfrick, Albert D.  <br/><br/>
Modern Electronic Instrumrntation and Mestrumentation Techniques 
/ by Albert D. Helfrick 
 - New Delhi:  Prentice-Hall of India Private Limited,  2003. 
 - xii, 445p.; 
<br/><br/><label>ISBN: </label>8120307526 
<br/><br/><label>Dewey Class. No.: </label>621.37  / HEL/M