VOICE AND DATA COMMUNICATIONS HANDBOOK.
BATES, REGIS J
VOICE AND DATA COMMUNICATIONS HANDBOOK. - 5th ed. 2009 - NEW DELHI TATA MCGRAW-HILL PUB. CO. LTD. - 644
  VOICE AND DATA
621.389.389 / BAT
VOICE AND DATA COMMUNICATIONS HANDBOOK. - 5th ed. 2009 - NEW DELHI TATA MCGRAW-HILL PUB. CO. LTD. - 644
  VOICE AND DATA
621.389.389 / BAT