CCITT Plenary Assembly (Red Book) Malaga-Torremolinos, 1984 :   Telegraph Switching, Recommendations of the U Series : Fascicle /   Vol.VII.2 

 - Geneva :   ITU,   1984. 
 - IX, 223 s.;   30 cm. 
<br/><br/><label>ISBN: </label>9261022812