000 00221 a2200097 4500
001 25762
100 _aSmitth, J R G
245 _aElementary telecommunication practice
260 _a
_bE L B
_c1967
090 _c17409
_d17409
942 _aNUST-CAE
_cM
_c8235
999 _c260835
_d260835