00313nam a2200121 a 450000500170000002000150001708200220003210000160005424500340007025000120010426000570011630000180017320251203091941.0  a0582219248  a621.3815,bD, Gre  aGreen, D.C.  aDigital electronic technology  a3rd ed.  aEnglaNew DelhibLongman Scientific & Technicalc1993  a228p.c26 cm.