| 000 | 00323nam a2200097Ia 4500 | ||
|---|---|---|---|
| 999 |
_c5614 _d5614 |
||
| 100 | _aMinistry of Housing and Local Government | ||
| 245 | _aTechnical Memorandum on Activated Sludge Sewage Treatment Installations providing for a long period of Aeration | ||
| 260 |
_c1969 _bH.M.S.O. LONDOAN _aLondon |
||
| 300 | _a8 | ||
| 942 | _cREF | ||