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Beverley Hanna has written:

'Lead as an environmental pollutant' -- subject(s): Environmental aspects, Environmental aspects of Lead, Lead, Lead-poisoning

'Field studies on the phytotoxicity of crude oil to Subarctic aquatic vegetation' -- subject(s): Aquatic plants, botany, Ecology, Effect of petroleum on, Environmental aspects, Environmental aspects of Oil spills, Oil spills, Plants

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10y ago

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