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  1. Annual statistics of concentration and deposition--cumulative precipitation monitoring network.
    By: Ontario.
    Publication info: Toronto :A.P.I.O.S. Coordination Office,1983-
    Contributed by: Ontario Ministry of the Environment (archive.org)
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  2. Annual statistics of concentration and deposition--daily precipitation and air monitoring network / Special Studies Unit, Atmospheric Research and Special Program Section, Ontario Ministry of the Environment, Air Resources Branch.
    By: Ontario.
    Publication info: Toronto :A.P.I.O.S. Coordination Office,1984-
    Contributed by: Ontario Ministry of the Environment (archive.org)
    View Book