000 00323nam a2200121Ia 4500
008 211209s1978 xx 000 0 und d
041 _aeng
082 _a621.3919 N78 GRO
100 _aGROGS W D
245 _aANALOG AND DIGITAL COMMUNICATION CONCEPTS: SYSTEMS, APPLICATIONS AND SERVICES
260 _c1978
300 _a584
999 _c12478
_d12478