000 003190000a22001330004500
245 _aDesign of law - head hydraulic structures
110 _aUnited Nations, ESCAP
260 _aBangkok
_bESCAP
_c1973
440 _aWater resources series
440 _aNo. 45
080 _a627.8
_bU8
041 _aEN
942 _cBK
999 _c116082
_d116082