Browsing by Author "Jackson, Willard L."
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Guide to grading defects in ponderosa and sugar pine logs
Jackson, Willard L. (USDA Forest Service. Pacific Southwest Forest and Range Experiment Station, 1962) -
Log diagraming guide for western softwoods
Jackson, George H.; Henley, John W.; Jackson, Willard L. (USDA Forest Service. Pacific Northwest Forest an Range Experiment Station, 1963)