00351nam a22001457a 450000500170000001000130001702000100003003500130004003700240005308200120007710000160008924500420010526000370014730000210018420190509160654.0  aB-492830  c50.00  aB-492830  bNeelam Publications  a620.106  aKundra, S.K  aScience for tenth class /cS.K Kundra  aDelhibNeelam Publicationsc1993  a225pc24cm (hbk)