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james w walters phytopathologist
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An aid to identifying aspen diseases frequently encountered in the Southwest
James W. Walters (phytopathologist) · for sale by the Supt. of Docs., U.S. Govt. Print. Off.
12 sayfa · 1975
Aspen / diseases and pests
Detection of oak mortality on Sherburne National Wildlife Refuge, Minnesota, 1979
James W. Walters (phytopathologist) · U.S. State and Private Forestry, Northeastern Area
Sayfa sayısı yok · 1980
Oak / Diseases and pests / Ceratocystis fagacearum / Aerial photography in forestry / Forests and forestry
An aid to identifying aspen diseases frequently encountered in the Rocky Mountains
James W. Walters (phytopathologist) · U.S. Dept. of Agriculture, Forest Service, Southern Region, State and Private Forestry, Forest Pest Management
20 sayfa · 1984
Aspen