000 00298nam a2200121Ia 4500
999 _c17143
_d17143
020 _a0070991855
100 _aRoger L Tokheim MS.
245 _aSchaum's Outline of Theory and Problems of Digital Principles
250 _a2
260 _c1988
_bMcGRAW HILL
_aNew York
300 _a321
942 _cBK