000 00323nam a2200109Ia 4500
008 220601s2017 xx 000 0 eng d
100 _aSINGH, KUMAR ASHOK
245 0 _aSCIENCE & TECHNOLOGY FOR CIVIL SERVICES EXAMINATIONS
250 _a28th . Ed.
260 _c2017
_aNew Delhi
_bMcGRAW HILL EDUCATION Pvt
942 _2ddc
_cBTECH
999 _c3523
_d3523