CCITT General Plan for the Development of the Interregional Telecommunication Network 1987-1989-1992 (Supplement) /   suppl.1 

 - Geneva :   ITU,   1990. 
 - 131 s.;   30 cm. 
 - European Microwave Conference Management Committee .
 - European Microwave Conference Management Committee .
<br/><br/><label>ISBN: </label>9271030648