000 00303nam a2200109Ia 4500
008 191031s9999 xx 000 0 und d
100 _aUnited Nations Water Conference (March 1977)
245 0 _aWater development managemnt Vol. 1
260 _b"Plenum Press, New York"
260 _c1978
942 _cBK
999 _c204492
_d204492