Froehlich, Fritz E. <br/><br/>
Encyclopedia of telecommunications 

 - v4(vi, 517p.)  v14(viii, 472p.)  v18(vi, 341p.); 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Commerce : Encyclopedia
<br/><br/><label>Dewey Class. No.: </label>384.03  / FRO