000 00326nam a2200133Ia 4500
999 _c24462
_d24462
008 190711s9999 xx 000 0 und d
020 _a0890063400
082 _a621.38456 W181;2
100 _aWalker, John.
245 0 _aMobile Information Systems
260 _aLONDON
_bArtech House
_c1990
300 _a24X16
942 _cBK