Heldman, Robert K. <br/><br/>
Information telecommunications. Networks, products & services 
Robert K. Heldman 
 - xiv, 386p. 
<br/><br/> BIBLIOTECA: UACH-FING 
<br/><br/><label>ISBN: </label>0-07-028040-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecomunicacion<br/>Ciencia de la informacion
<br/><br/><label>Dewey Class. No.: </label>384  / HEL 1994