00308nam a2200121 a 450000500170000002000150001708200180003210000220005024500300007226000350010230000260013770000230016320251203110731.0  a8178087537  a621.3822bOPP  aOppenheim,V. Alan  aDigital Signal Processing  aDelhibPearson Educationc1975  axiv, 584p.c24 cm. PB  aSchafer, W. Ronald