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  1. Countdown acid rain : future abatement strategies : summary report / report prepared by Air Resources Branch, Ontario Ministry of the Environment.
    By: Ontario. - SENES Consultants Limited.
    Publication info: [Toronto, Ont.] :Queens Printer for Ontario,c1992.
    Contributed by: Ontario Ministry of the Environment (archive.org)
    Subjects: Acid rain  Air  Environmental aspects  Nitrogen oxides  Ontario  Pollution  Sulfur dioxide  
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  2. Sulfur-house operation /
    By: Phaff, Herman. - Mrak, E. M.
    Publication info: Berkeley, Calif. :University of California, College of Agriculture, Agricultural Experiment Station,1948.
    Contributed by: University of California, Davis Libraries (archive.org)
    Subjects: Fruit  Postharvest losses  Preservation  Prevention  Sulfur dioxide  
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  1. Tillandsia recurvata L. as a bioindicator of sulfur atmospheric pollution
    By: Graciano,Corina - Fernández,L V - Caldiz,D O
    Type: Article
    In: Ecología austral
    Date: 2003-06-01
    Subjects: atmospheric pollution  bioindicator  Sulfur dioxide  Tillandsia recurvata  
    View Article (External)