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- 75491815 contributor B2693171.
- 75491815 created "1969.".
- 75491815 date "1969".
- 75491815 date "1969.".
- 75491815 dateCopyrighted "1969.".
- 75491815 extent "8 p.".
- 75491815 identifier "0117502154".
- 75491815 issued "1969".
- 75491815 issued "1969.".
- 75491815 language "eng".
- 75491815 publisher "London, H.M.S.O.,".
- 75491815 subject "628/.354".
- 75491815 subject "Sewage Purification.".
- 75491815 subject "Sewage disposal plants.".
- 75491815 subject "TD756 .G74".
- 75491815 title "Technical memorandum on activated-sludge sewage-treatment installations providing for a long period of aeration.".
- 75491815 type "text".