Fike, John L. <br/><br/>
Understanding telephone electronics / 
J. L. Fike, et al. 
 - 3rd ed. 
 - Indianapolis :  SAMS,  1993. 
 - v, 367 p. :  ill. ;  23 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0672273500 
<br/><br/><label>LCCN: </label>9162208  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone.<br/>Electronics.