Baran, Paul.  <br/><br/>
The Future of the Telephone Industry 1970-1985 :   a Special Industry Report R-20 /  
Baran Paul, Lipinski Andrew J.. 
 - 2 edition. 
 - Menlo Park, California :   Institute for the Future,   1971. 
 - VII, 172 s.;   29 cm. 
 - Biblioteka Radiotechnologa .
 - Biblioteka Radiotechnologa .