000 00291nam a2200109Ia 4500
100 _aW.H.O. Tech Report services no.742
942 _cBK
245 _aTechnology for water supply and sanitation in developing countries
260 _aW.H.O., Geneva
_c1987
082 _aR628.1 W.H
300 _a38
999 _c64785
_d64785