000 00287nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aData Communications
260 _aMcGraw-Hill Information Systems Co.
_bNew York
_c1 Jan,0991-31 Aug,1991
362 _a20-20
_b01-Aug
942 _2ddc
_cJ
999 _c179788
_d179788