| 000 | 00325nam a2200109Ia 4500 | ||
|---|---|---|---|
| 008 | 220729s1997 xx 000 0 und d | ||
| 041 | _aeng | ||
| 100 | _aWHO | ||
| 245 | _aGuidelines for drinking-water quality surveillance and control of community supplies | ||
| 250 | _a2 | ||
| 260 |
_aGeneva _bWHO Regional Publications _c1997 |
||
| 999 |
_c131043 _d131043 |
||