In mid-October , Dr. Bergdahl was among 40 scientists and foresters from the United States and Canada who met in Niagara Falls , Ontario , for the Butternut Canker Research Symposium .
Canada
Niagara Falls
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Canada
Ontario
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Canada
Ontario
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Ontario
Niagara Falls
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Ontario
Canada
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United States
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Canada
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Niagara Falls
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Ontario