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040			_e63539 _aMAIN
041			_aEnglish
082			_a001.642 T561D
100			_aTocci, Ronald J
245		0	_aDigital systems: principles and applications
250			_a6th ed.
260			_aNew Delhi _bPrentice-Hall _c2000
300			_axviii, 827 p.
942			_cBK
999			_c104214 _d104214