000 | 00397nam 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 | _pS8650 | ||
942 |
_cB _2udc |
||
999 |
_c136659 _d136659 |