00313nam a2200121Ia 4500008004100000020001500041041001200056100001800068245005600086260002500142300000800167650001600175221030s9999    xx            000 0 und d  a0070648549  aEnglish  aM. J. Roberts 0aFundamentals of Signals & Systemscby M. J. Roberts  bTMHaNew Delhic2009  a761  aBE Computer