000 00376nam a2200133Ia 4500
020 _a0000000000000
082 _b1021
_a001.642
245 0 _aPC Upgrading and Maintenance
260 _boxford Press,,Nelson,Redspot,collins,Marshalk Cavendish,Federal,BPB Publications
_c1985
300 _a233
944 _cBK
999 _c388821
_d388821