000 00291nam a2200109Ia 4500
020 _a0273318403
100 _aRenton R N
245 _aElementary Telecommunication Principles
260 _c1972
_bTHE ENGLISH LANGUAGE BOOK SOCIETY & PITMAN PUBLISHING
_aLondon
300 _aix+288
942 _cBK
999 _c5937
_d5937