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Forest Insect and Disease Survey; Ontario, 1965 - NFIS

Forest Insect and Disease Survey; Ontario, 1965 - NFIS

Forest Insect and Disease Survey; Ontario, 1965 - NFIS

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Deterioration of roadside sugar maple<br />

St<strong>and</strong> of white elm showing damage <strong>and</strong> tree mortality<br />

caused by Dutch elm disease Ceratocystis ulmi (Buism)<br />

C. Moreau

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