by Lewis F. Roth
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Port-Orford-cedar root disease
Influence of temperature, moisture, and ...
Life history and distribution of Pythium...
Soil disturbance-tree growth relations i...
Twenty-year growth of ponderosa pine sap...
Ten-year performance of ponderosa pine p...
Twenty-year growth of thinned and unthin...
Arizona five-spined ips
Western pine-shoot borer