000 00285nam a2200109Ia 4500
008 220601s2017 xx 000 0 eng d
100 _aUPADHYAY, A K
245 0 _aRAILWAY,BRIDGES AND TUNNELS
250 _a2nd . Ed.
260 _c2017
_aNew Delhi
_bS.K.KATARIA & SONS
942 _2ddc
_cBTECH
999 _c3522
_d3522