00309nam a2200109Ia 4500003000400000008004100004040001600045082001500061245006000076260005300136300001000189GCL140319s9999    xx            000 0 eng d  aGCL / cGCL04aFTb389.0310aThe Froehlich\ Kent Encyc\ Opedia of Telecommunications  a[S.N] : bMacmillan Publishing Company ، c1994  a488 P