00499nam a22001577a 450000500170000001000150001702000230003203500140005503700090006908200080007810000200008624501160010626000440022227000550026630000200032120240816162414.0  aENG-141065  c655.00a8179308723  aEN-124597  bDBAD  a000  aRajaram Kalpana  aDevelopmwnts in Science and technology/cKalpana RajarambUPSC Civil Services Main and prelims General Studies,  aNew delhibSPECTRUM BOOKS (p) Ltdc2023  aA1 291, First Floor, Janakpuri,bnew delhie110028  a747 pagesc24cm