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024 _a49580
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aH422a, L0
100 _aUNESCO
245 0 _aTextbook on hydrology
260 _c1970
300 _ap.
_ccm.
490 _aTechnical papers in hydrology
650 _aExternal Dynamic
942 _hH422a, L0
_cTEXL
_2CC
999 _c85110
_d85110