000			00435 a2200073 4500
245	0		_aCCITT Plenary Assembly (Yellow Book) Geneva, 1980 : _bData Communication Networks, Transmission, Signalling and Switching, Network Aspects, Maintenance, Administrative Arrangements, Recommendations X.40-X.180 (Study Group VII) / _c. _nVol.VIII-3
710	2		_aInternational Telecommunication Union. _eWydawca _4pbl
260			_aGeneva : _bITU, _c1981.
300			_aVI, 273 s.; _c30 cm.
999			_c13974 _d13974