000 00271nam a2200121Ia 4500
008 230913s9999 xx 000 0 und d
100 _aHira, D.S.
245 0 _aSystem Simulation
260 _aNEW DELHI
260 _bS.CHAND
260 _c2010
650 _aMathematics
999 _c140538
_d140538