John C Dvorak,Nick Anis <br/><br/>
Dvorak''s Guide''s To PC Telecommunications 

 - 
 -  Osborne McGraw-Hill  1992 
 - 1128 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-07-881787-0 
<br/><br/><label>Dewey Class. No.: </label>621.39