000 00272nam a2200109Ia 4500
008 220201s2013 xx 000 0 eng d
100 _aUPADHYAY A K
245 0 _aRAILWAYS AND BRIDGES TUNNELS
260 _aDELHI
_bS K KATARIA AND SONS
_c2013
300 _a244
942 _2ddc
999 _c93453
_d93453