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  1. 1
    Published 1975
    [Toronto] : Ministry of the Environment, 1975.
    vii, 366 p. : ill. ; 30 cm.
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  2. 2
    Published 1977
    [Toronto] : Ministry of the Environment, [1977]
    vii, 373 p. : ill. ; 30 cm.
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  3. 3
    Published 1979
    [Toronto] : Ontario Ministry of the Environment, 1979.
    v, 345 p. : ill. ; 30 cm.
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  4. 4
    Toronto, Ministry of the Environment.
    26 v. ill. 30 cm.
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  5. 5
    Published 1988
    Toronto, Ont. : Ontario Ministry of the Environment, 1988-
    v. : ill ; 30 cm.
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  6. 6
    Published 1980
    New Delhi : Central Board for the Prevention and Control of Water Pollution, 1980.
    107 p., [16] leaves of plates : ill., map ; 30 cm.
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  7. 7
    Published 1987
    [Toronto] Ministry of the Environment, 1987.
    343 p.
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  8. 8
    Published 1978
    [Toronto] : Ontario Ministry of the Environment, [1978]
    xi, 390 p. : ill., maps ; 30 cm.
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  9. 9
    Published 1974
    Calcutta : Institution of Engineers (India), [1974?]
    viii, 187 p. : ill., map ; 30 cm.
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  10. 10
    Published 1980
    Toronto : Ontario Ministry of the Environment, 1980.
    v, 295 p. : ill. ; 29 cm.
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  11. 11
    Published 1972
    [Toronto] : Ministry of the Environment, 1972.
    301 p. : ill. ; 28 cm.
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  12. 12
    Published 1986
    [Toronto] Ministry of the Environment, 1986.
    302 p.
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  13. 13
    [Toronto]
    8 v. ill. 28 cm.
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