000 00308nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a624:625
_bGUP
100 _aGupta, B L
245 0 _aRoad railway bridge and tunnel engineering
260 _aDelhi
_bStandard
_c1978
650 _aEngineering
942 _cBK
999 _c30820
_d30820