机构:
Centre for Hydrology, Geography and Planning, University of Saskatchewan, Saskatoon,SK,S7N 5C8, CanadaTrent University, Peterborough,ON,K9J 7B8, Canada
Whitfield, Colin J.
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Fenn, Mark E.
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机构:
Research Plant Pathologist, USDA Forest Service, Pacific Southwest Research Station, Riverside,CA,92507, United StatesTrent University, Peterborough,ON,K9J 7B8, Canada