000 00237nam a2200109Ia 4500
020 _a9788120327603
100 _aOGATA KATSUHIKO
_91241
245 _aDISCRETE - TIME CONTROL SYSTEMS
250 _aNIL
260 _c2007
_bPHI
490 _aP2156
999 _c2190
_d2190