000 00309nam a2200121Ia 4500
008 211209s1991 xx 000 0 und d
041 _aeng
082 _a004.6 N91 MAR
100 _aMARTIN, HORST-EDGAR
245 _aCOMMUNICATION WITH ISDN
260 _aNEW DELHI
_bGALGOTIA PUBLICATION
_c1991
300 _a329
999 _c25273
_d25273