000 00280nam a2200121Ia 4500
008 180721s9999 xx 000 0 und d
100 _aGurucharan Singh
245 0 _aEssentials of hydrology
260 _b"Nipa, New Delhi"
260 _c2009
365 _b792.00
942 _cBK
999 _c144130
_d144130