text Glebe, New SOuth Wales Blake Education 2007 eng 32 p. : ill. ; 25 cm. Ian Rohr COMMUNICATION COMMUNICATION CHANNELS TELECOMMUNICATION INFRASTRUCTURES FACILITIES 316.77:087.5 316.77:087.5 ROH c 231004 20231004114456 INLIS000000000040901 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)