000 00282nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aData Communications
260 _aMcGraw-Hill Information Systems Co.
_bNew York
_c1 Jan-31 Jan,1990
362 _a19-19
_b01-May
942 _2ddc
_cJ
999 _c179779
_d179779