00490nam a22001697a 450000500170000001000130001702000260003003500130005603700090006908200080007810000160008624500710010226000300017327000650020330000290026870000230029720250106161543.0  aB-761564  a9789355019424c630.00  aB-761564  bGift  a500  aGowel, B.K.  aRevised Edition Science Mission/cB. K. Gowel and Sangeeta Singhal  aNew DelhibS. Chandc202?  aB-1/E-7 Mohan Estate, Badarpur, New DelhibNew Delhie110044  a222p.bcol.illc28cm(pb)  aSinghal, Sangeeta