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- 89192503 alternative "Water and wastewater operators' 1987 seminar.".
- 89192503 contributor B6005396.
- 89192503 contributor B6005397.
- 89192503 created "1987].".
- 89192503 date "1987".
- 89192503 date "1987].".
- 89192503 dateCopyrighted "1987].".
- 89192503 extent "ii, 115 p. :".
- 89192503 issued "1987".
- 89192503 issued "1987].".
- 89192503 language "eng".
- 89192503 publisher "[Edmonton? : Alberta Environment, Pollution Control Division,".
- 89192503 subject "628.1 20".
- 89192503 subject "Sewage Purification Congresses.".
- 89192503 subject "TD430 .A43 1987".
- 89192503 subject "Water Purification Congresses.".
- 89192503 title "1987 Operators Seminar : presentations made at the 1987 Alberta Operators Seminar, Banff Park Lodge, March 11, 12, 13, and 14, 1987.".
- 89192503 type "text".