White pine blister rust control in the northwestern region: January 1 to December 31, 1950

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http://hdl.handle.net/10217/170667
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Creator(s)
Swanson, Herman E., author; Gynn, J. C., author; Chapman, C. M., author; U. S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Plant Disease Control, publisher

Date
1951?
Format
reports
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