Evaluating New Telecommunications Services. (Proceedings of the NATO Telecommunications Symposium held at the University of Bergamo,Italy,September 5-8, 1977.) / 
Ed. Elton Martin C.J. [i in.]. 
 - New York :  Plenum Press,  1977. 
 - XIII,784 s.,bibliogr. ;  24 cm. 
<br/><br/> NATO Conference Series Systems Science. 
<br/><br/><label>Universal Decimal Class. No.: </label>621.39  654(061.3)