CCITT Plenary Assembly (Red Book) Malaga-Torremolinos, 1984 :   Specifications of Signalling System No.7, Recommendations Q.721-Q.795 : Fascicle /   Vol.VI.8 

 - Geneva :   ITU,   1984. 
 - X, 287 s.;   30 cm. 
<br/><br/><label>ISBN: </label>926102211