Telecommunications and networks buyer's guide. 1990 July-December. 
 Networks.  Telecommunications. 

 - v. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecomunicación<br/>Comunicaciones digitales.
<br/><br/><label>LC Class. No.: </label>TK5102.5  / .T375 1990