000			00346nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
020			_a71980070
082			_a621
082			_b380412
100			_a"Jones,F.Hope"
245		0	_aElectrical Timekeeping
260			_aLondon
260			_bN.A.G. PresS
260			_c1976
300			_axxiii- 279
999			_c25821 _d25821