na INLIS000000000040901 20231004114456 0010-0119005814 231004 c 0 eng Communications / Ian Rohr ROHR, Ian Glebe, New SOuth Wales : Blake Education, 2007 32 p. : ill. ; 25 cm. 316.77:087.5 ROH c 316.77:087.5 COMMUNICATION COMMUNICATION CHANNELS TELECOMMUNICATION INFRASTRUCTURES FACILITIES 335/BA/2014