Carlson, Bruce A. <br/><br/>
Communication system :  an introduction to signals and noise in electrical communication / 

 - 2nd ed. 
 - India :  McGraw-Hill,   c1975. 
 - xv, 495 p. :  ill. ;  21 cm. 
<br/><br/><label>ISBN: </label>007009957X 
<br/><br/><label>LC Class. No.: </label>1936 & 2478 
<br/><br/><label>Dewey Class. No.: </label>621.382  / CAR