000 00266nam a2200109Ia 4500
008 220201s1996 xx 000 0 eng d
100 _aSingh, AP & Singh, SP
245 0 _aRailways bridge & tunnels
260 _bSatya Prakashan
_c1996
300 _a330
942 _2ddc
999 _c86406
_d86406