000 00287nam a2200121Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a624.1
100 _aVarshney, RS
245 0 _aHydro- power structures
260 _bRoorkee: Nem Chand & Bros
_c1977
300 _a680
942 _2ddc
999 _c80727
_d80727