000			00351nam a2200157Ia 4500
008			190201s9999 xx 000 0 und d
020			_a70572909
082			_a621
082			_b3192 S
100			_a"Siebert,William,M."
245		0	_a"Circuits, Signals, And S"
260			_aNew York
260			_bMc-Grew
260			_c1986
300			_a"xi,651"
999			_c24714 _d24714