| 000 | 00398nam a2200145Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 245 | _aWater purification methods-techniques-equipment | ||
| 260 | _aPennsylvania | ||
| 260 | _bPennsylvania Agricultural Experiment Station | ||
| 260 | _c1963 | ||
| 300 | _a0.5 | ||
| 440 | _aNo. 67; Pennsylvania Agricultu | ||
| 901 | _pS14872 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c136660 _d136660 |
||