Hershberger, William Delmar,  1903-, <br/><br/>
Principles of communication systems / 
By w. d. hershberger 
 - 253 páginas 
 - Prentice-hall electrical engineering series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecomunicaciones
<br/><br/><label>LC Class. No.: </label>TK5101  / H47