000			00384nam a2200133Ia 4500
008			211215s9999 xx 000 0 und d
040			_cJayakar Knowledge Resource Centre
100			_aPerrine, J O
245		0	_aPhysics and mathematics in electrical communication
260			_bJohn F Rider Publishers Inc _aNew York _c1958
300			_a265 p.
653			_aEngineering
942			_c1
999			_c63694 _d63694