Black, Harold S.,  1898- <br/><br/>
Modulation theory / 
Harold S. Black 
 - New York :  Van Nostrand,  1953 
 - xi, 363 p. :  ill. ;  24 cm. 
<br/><br/><label>LCCN: </label>53-010091 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modulation theory<br/>Telecommunication