00326nam a2200133Ia 450000500170000000800410001702000180005808200240007610000190010024500240011926000250014330000120016865000120018020250416162752.0231217s9999    xx            000 0 und d  a9788120338517  a621.38143  RAV;1  R  aRavi Kumar, T. 0aSignals and systems  c2009bPHIaNew Delhi  axv, 563  aSignals