000 002810000a22001210004500
245 _aGuide to hydrological practice
110 _aWorld Meteorological Organization
250 _a3d ed.
260 _aGeneva
_bWMO
_c1974
080 _a556(026)
_bW6
041 _aEN
942 _cBK
999 _c110738
_d110738